Citigroup is one of three Wall Street banks attempting to keep hidden their practice of paying executives multimillion-dollar awards for entering government service. In letters delivered to the Securities and Exchange Commission (SEC) over the last month, Citi, Goldman Sachs and Morgan Stanley seek exemption from a shareholder proposal, filed by the AFL-CIO labor coalition, which would force them to identify all executives eligible for these financial rewards, and the specific dollar amounts at stake. Critics argue these “golden parachutes” ensure more financial insiders in policy positions and favorable treatment toward Wall Street.

“As shareholders of these banks, we want to know how much money we have promised to give away to senior executives if they take government jobs,” said AFL-CIO President Richard Trumka in a statement. “It’s a simple question, but the banks don’t want to answer it. What are they trying to hide?”

The handouts recently received attention when Antonio Weiss, the former investment banker at Lazard now serving as counselor to Treasury Secretary Jack Lew, acknowledged in financial disclosures that he would be paid $21 million in unvested income and deferred compensation upon exiting the company for a job in government. Weiss withdrew from consideration to become the undersecretary for domestic finance under pressure from financial reformers, but the counselor position—which does not require congressional confirmation—probably still entitles him to the $21 million. The terms of the award are part of a Lazard employee agreement that nobody has seen.

These payments are routine at major banks, several of which have explicit policies, found in filings with the SEC, outlining automatic awards for executives who rotate into government. Goldman Sachs offers “a lump sum cash payment” for government service, for example.

Other banks’ policies are subtler. Banks often defer certain types of compensation in order to retain talent. When an executive terminates employment, unvested stock options and other forms of deferred compensation are usually forfeited. But several companies let executives’ equity options continue to vest if they leave for a government position, or allow them to keep retention bonuses that would otherwise be returned to the firm. A 2004 tax law banned accelerated payments but made an exemption for employees who leave for government service. Critics wonder whether the gifts are intended to fill the government with friendly faces who will act in their former employer’s interests.