The Treasury Department will make an ally of billionaire Elon Musk’s U.S. DOGE Service the head of the department that oversees the nation’s powerful payment systems, according to two people with knowledge of the matter,

In their Monday lawsuit in Washington, D.C., federal court, the employee unions and retirees said Treasury had violated privacy laws by giving Musk and DOGE “full access” to government payment records documenting everything from income tax payments to social security benefits and federal employee salaries.