The New York Times reports:

For six years, Audrey Ellis and Adam Feuerstein worked together at PwC, the giant accounting firm, helping the world’s biggest companies avoid taxes.

In mid-2018, one of Mr. Feuerstein’s clients, an influential association of real estate companies, was trying to persuade government officials that its members should qualify for a new federal tax break. Mr. Feuerstein knew just the person to turn to for help. Ms. Ellis had recently joined the Treasury Department, and she was drafting the rules for this very deduction.

That summer, Ms. Ellis met with Mr. Feuerstein and his client’s lobbyists. The next week, the Treasury granted their wish — a decision potentially worth billions of dollars to PwC’s clients.

About a year later, Ms. Ellis returned to PwC, where she was immediately promoted to partner. She and Mr. Feuerstein now work together advising large companies on how to exploit wrinkles in the tax regulations that Ms. Ellis helped write.

Ms. Ellis’s case — detailed in public records and by people with direct knowledge of her work at the Treasury and at PwC — is no outlier.

The largest U.S. accounting firms have perfected a remarkably effective behind-the-scenes system to promote their interests in Washington. Their tax lawyers take senior jobs at the Treasury Department, where they write policies that are frequently favorable to their former corporate clients, often with the expectation that they will soon return to their old employers. The firms welcome them back with loftier titles and higher pay, according to public records reviewed by The New York Times and interviews with current and former government and industry officials.

From their government posts, many of the industry veterans approved loopholes long exploited by their former firms, gave tax breaks to former clients and rolled back efforts to rein in tax shelters — with enormous impact. [Continue reading…]