According to online reports, according to the Washington Post, three people familiar with the matter revealed that David A., the highest-ranking career official in the U.S. Treasury Department, who has served in a non-political position in the Treasury Department for decades. Lebryk announced his retirement in an email sent to colleagues on Friday after conflicts with Musk's representatives over access to sensitive payment systems. Trump appointed Lebryk as acting Treasury Secretary after taking office last week. Sources said Lebryk and Musk's agents were at odds over the trillions of dollars the U.S. government uses each year to pay for access to the payment system. Officials at Musk's Department of Government Efficiency have been demanding access to the system since the election. Typically only a few career officials control the Treasury Department's payment systems, which are managed by the Financial Services Bureau and control the flow of more than $6 trillion a year to households, businesses and more sectors across the country. They are responsible for distributing social protection and Medicare benefits, federal worker salaries, payments to government contractors and grant recipients, tax refunds and tens of thousands of other functions. It is unclear exactly why Musk's team sought access to these systems.