I was there as recently as yesterday, and until this event unfolded, and from my Experiance they do things fairly bureaucratically. They make announcements about everything, and etc. This was almost uncharacteristic for him to do. And while yes higher ups tend to make more, there would be complete revolt if say the president took all the money from the U.S. treasury for himself.
Especially if he denied doing such, even when the receipt is open.