They are auditing as part of their process of cutting costs. They're literally tracing trillions of dollars in financial records.
He's doing everything he's doing by executive order of the President of the United States, who was elected.
And already has a number of lawsuits started because he's trying to do things neither he nor the president are allowed to do. Getting an EO to do something doesn't mean it's automatically legal. Multiple big decisions have already been reverted or are held until judges can review them. Even things like the promised payout for quitting are not practical, because only congress can approve the money for that.
He, a single person, has far too much control of our system.
Thats not how it works.
Btw. i think having the richest man in the world in his current position is very very unique.