There are already departments who’s job it is to do this. Sadly though they are being underfunded so they cannot do their job properly and their reports are given lip service by the government and press. There are known unaccounted for millions of not billions at the DoD. There is horrific wasteful spending at the executive branch. They simply fire them or let them resign but never attempt to recoup falsely spent monies. Let alone the waste or rather funneling of funds from the public coffers to the presidents golf courses and hotels. Yes. This might be a good idea but people are already doing it. Perhaps a bill to make it law that it gets actually looked at and a way of making those wasting it accountable and repay it.