In the DoD alone, probably 20% of their budget goes to: waste, graft, fraud, overcharges, and kickbacks.

The last time the Pentagon was audited, IIRC they were unable to account for a few billion, then instead of digging deeper the matter was dropped.

Someone places an order for 50,000 overpriced widgets... which are never used... then 20 years later they're found in a warehouse... and then, of course, there are things like the infamous $15,000 toilet seat, lol.