The Revolving Door

I. How the Machine Works

Parts One and Two of this series documented two discrete events: an American Express CEO exercising $48.9 million in options on election night with no trading plan, and an Abbott Laboratories subsidiary moving to Malta on December 19 followed five days later by a $500,000 inaugural donation. Each event had a clear receipt. Each receipt pointed to the same policy outcome: the withdrawal from the OECD's Pillar Two global minimum tax on January 20, 2025.

Part Three is different. It is not about a single event or a three-day sequence. It is about the institutional mechanism that made the policy outcome not just possible but permanent — the apparatus that converted a Day 1 executive order into a multilateral exemption that no future U.S. president can easily reverse by simply rejoining the OECD framework.

That mechanism has a name. It is called the revolving door. And in this case, the door is documented to the filing number.

Rebecca Burch said that as a Treasury official. Before she was a Treasury official, she was a registered lobbyist at Ernst & Young. Before she was a lobbyist, she spent a decade at the IRS. The arc of her career is the arc of the revolving door: she learned how the government catches these structures from the inside, spent a decade using that knowledge to build and protect them for private clients, and then returned to government to dismantle the last framework that would have ended them permanently.

The Senate lobbying disclosure database confirms exactly one of her client relationships from her EY years. It is sufficient.

II. The Confirmed Filing — Senate LDA 604c2a8b

Lobbying disclosures in the United States are filed semi-annually under the Lobbying Disclosure Act and are maintained in a public database administered by the Senate Office of Public Records. The filings name the registrant (the lobbying firm), the client, the issues lobbied, and the individual lobbyists who worked on the engagement.

Senate LDA filing ID 604c2a8b is a quarterly report filed by EY Washington Council — the lobbying arm of Ernst & Young — for the first quarter of 2024. The client is Thermo Fisher Scientific. The income reported: $60,000. The issues lobbied:

GILTI is the Global Intangible Low-Taxed Income tax — the U.S. provision that imposes a minimum tax on the offshore profits of American multinationals. Under the Biden administration, the Treasury Department attempted to raise the GILTI rate from 10.5 percent to 15 percent, aligning it with Pillar Two. FDII is the Foreign-Derived Intangible Income deduction — the U.S. provision that incentivizes companies to route intangible income (royalties, IP licensing fees) through offshore structures rather than booking it in the United States.

Together, GILTI and FDII are the two main levers in U.S. international tax law governing how much tax American multinationals pay on offshore profits. EY was lobbying Congress to keep GILTI low and FDII generous — on behalf of Thermo Fisher Scientific, whose Malta structures generate an estimated $3.5 billion in annual tax savings, the largest single Pillar Two benefit in the dataset this series has assembled.

The lobbyist named first on that filing: Rebecca Burch.

III. The Career Arc — IRS to EY to Treasury

Rebecca Burch's career follows the classic revolving door trajectory, but in a sector where the door's rotation matters more than almost anywhere else: international corporate tax, where the rules are written in government, the strategies are built in the private sector, and the enforcement depends entirely on who sits on which side at any given moment.

The knowledge transfer is the point. Burch did not move from IRS to EY to Treasury despite her expertise. She moved because of it. Her decade at the IRS gave her the enforcement architecture — the exact arguments, legal theories, and procedural pressure points the government uses to challenge offshore structures. Her decade at EY put that knowledge in service of the companies those structures benefit. Her appointment to Treasury placed her in the position to write the policy that would determine whether those structures survived Pillar Two.

She is not the only person who has made this journey. She is the person who completed it at the precise moment it mattered most.

IV. The Appointment — April 2025

Burch was appointed as Treasury's Deputy Assistant Secretary for International Tax Affairs in April 2025, confirmed through Bloomberg Tax and the Eide Bailly tax advisory tracking service. The appointment came roughly three months after Trump's Day 1 executive order withdrawing from Pillar Two — placing her in the role precisely as the administration was determining what the withdrawal would mean in practice and how to negotiate its consequences with OECD partner countries.

The standard ethics rules governing executive branch appointees require recusal from matters directly affecting former clients for one year from the date of departure from the private sector. Burch lobbied for Thermo Fisher Scientific in Q1 2024. She was appointed to Treasury in April 2025 — thirteen months later, which technically clears the standard one-year cooling-off period for lobbying on the specific issues she covered.

What the cooling-off period does not address: the broader institutional knowledge she carries about how these structures work, which clients benefit from them, which provisions protect them, and which enforcement mechanisms threaten them. The one-year rule governs direct client contact. It does not govern the structural knowledge she accumulated across a decade of building and protecting the exact category of arrangement now at the center of her policymaking portfolio. Orbit →

V. The OECD Side-by-Side — What It Actually Did

To understand why the Burch appointment matters, you need to understand what she negotiated. The January 20, 2025 executive order was dramatic — "no force or effect in the United States" — but it was also, by itself, incomplete. The EO removed the U.S. commitment to implement Pillar Two domestically. It did not prevent other countries from using Pillar Two's enforcement backstop against U.S. companies.

The backstop is called the UTPR — the Under-Taxed Profits Rule. Under Pillar Two, if a company's home country does not impose the 15% minimum on its offshore profits (as the U.S. would not, after the EO), other countries where the company operates can step in and levy the top-up tax themselves. An Irish subsidiary of Abbott could, theoretically, face a top-up tax levied by Ireland bringing its Malta profits up to the 15% minimum. A French subsidiary of Thermo Fisher could face top-up taxes in France.

Without the Side-by-Side exemption, the EO would have been a statement of principle without financial consequence. U.S. companies would simply have paid the top-up taxes to other countries instead of to the U.S. government. The Malta advantage would have been eliminated regardless of what Washington said.

What Burch negotiated — the OECD "Side-by-Side" package announced January 5, 2026 — addressed exactly this gap. The deal commits OECD member countries not to apply the IIR or UTPR against U.S.-headquartered companies, provided the U.S. maintains its existing GILTI framework as a functional equivalent. In return, the U.S. did not threaten tariff retaliation against countries that implemented Pillar Two domestically for their own companies.

The practical effect: every Malta structure, every Jersey holding company, every Singapore IP-box arrangement used by a U.S. multinational is now exempt from both U.S. top-up taxes (GILTI rate stays at 10.5%, not 15%) and foreign top-up taxes (IIR/UTPR carved out by Side-by-Side). Neither the country where the money sits nor the country where the company is headquartered will collect the additional tax. The $423 million AmEx Jersey advantage, the $336 million Abbott Malta advantage, the $3.5 billion Thermo Fisher Malta advantage — all permanent, as long as the Side-by-Side holds.

VI. The Complete Loop — Documented

The series has now documented the following sequence. Every link in it is sourced to a public filing, a confirmed appointment, or a published press release.

VII. The Thermo Fisher Connection — Specific and Confirmed

The relationship documented in Senate LDA filing 604c2a8b is not generic. Burch was not lobbying on behalf of an industry trade association. She was lobbying on behalf of a specific named client — Thermo Fisher Scientific — on specific named provisions — FDII and GILTI — that directly govern the profitability of Thermo Fisher's Malta structures.

Thermo Fisher's Q4 2024 lobbying disclosures — filed by the company directly, not through EY — explicitly list "expiration of key provisions of the 2017 Tax Cuts and Jobs Act, including those related to Foreign-Derived Intangible Income" as a lobbying issue. Thermo Fisher was lobbying on FDII independently and through EY simultaneously. The provisions are the same. The purpose is the same.

FDII is the provision that makes it financially advantageous for a U.S. parent company to hold intellectual property domestically while licensing it to an offshore subsidiary — which then pays reduced royalties through a low-tax jurisdiction like Malta. If FDII were eliminated or reduced, the Malta structure becomes less advantageous because the U.S. side of the arrangement becomes more expensive. EY lobbied to keep FDII intact. Burch was the EY lobbyist named on that engagement. She is now at Treasury administering the international tax policy framework within which FDII operates.

The cooling-off period argument — that 13 months between the lobbying engagement and the Treasury appointment breaks the chain — rests on the premise that the relevant harm is direct client contact rather than structural knowledge. This dispatch does not accept that premise. The harm in a revolving door is not that Burch called up Thermo Fisher's tax department after her appointment. The harm is that the official who designs the rules knows, in more detail than anyone else in government, exactly which structures those rules are being designed to protect and exactly how to write the exemption language to achieve that protection.

VIII. EY as Institution — Beyond Burch

The focus on Burch is appropriate because her career arc is documented and specific. But she is not the institution. EY is the institution. The revolving door does not require any individual to do anything improper. It requires only that the institution produces enough former government officials who understand the enforcement apparatus, places them in advisory roles where they design structures exploiting what they learned, lobbies on behalf of those structures' beneficiaries, and maintains enough relationships with incoming administrations to expect that alumni will eventually return to government in relevant positions.

EY has operated this model continuously across Republican and Democratic administrations for decades. The Malta guidance, the GILTI lobbying, the Thermo Fisher engagement, the Burch appointment — these are not aberrations. They are the model working as designed.

What makes this moment different is the completeness of the loop. In prior administrations, the revolving door produced incremental advantages: a favorable ruling here, a delayed enforcement action there. What the Pillar Two withdrawal and the OECD Side-by-Side represent is not an incremental advantage. It is the permanent institutionalization of the advantage — a multilateral agreement that removes the last enforcement mechanism, negotiated by the person who spent a decade at the firm that designed the structures being protected.

The revolving door does not require corruption. It requires only that the same people, carrying the same knowledge, move between the same institutions in the same direction, at the right moment.

IX. What the Three Parts Together Document

The Malta Cluster series has now documented three distinct mechanisms by which the Pillar Two withdrawal produced private benefit:

• Part One (Squeri / AmEx): Individual election-night trading on policy knowledge. No plan. $31.9 million net gain. The market was the mechanism.
• Part Two (Abbott): Corporate pre-positioning — move the structure, make the donation, file the Tax Court challenges, receive the order. The check was the mechanism.
• Part Three (Burch / EY): Institutional capture — design the structures, lobby for their protection, place your alumni in the regulatory seat, negotiate the permanent exemption. The revolving door was the mechanism.

None of these three mechanisms required the others. They operated in parallel, through different actors, via different instruments. What they share is a single policy outcome — the Pillar Two withdrawal and its codification in the OECD Side-by-Side — that produced, across ten documented companies, tax advantages totaling more than $7 billion annually. View Dashboard →

Squeri captured $31.9 million in one morning. Abbott protected $336 million a year for $500,000. Thermo Fisher protected $3.5 billion a year through a lobbying engagement that cost $60,000 a quarter and produced a Treasury official who negotiated their permanent exemption.

The arithmetic of the revolving door is always the same: the investment in the institution is small. The return on institutional capture is enormous. Donor Records →