The Ministry of Fiscal Responsibility has an accounting note it would rather you not read alongside its demands for higher taxes: the government's own watchdog, the GAO, estimates that Washington loses between $233 billion and $521 billion every single year to outright fraud — not waste, not bloat, not interest on the debt, but theft — which at the upper end is $1.4 billion a day, or roughly 10% of an entire year's federal revenue simply vanishing into criminal pockets. The range is a quarter-trillion dollars wide because the government cannot even determine how much it is being robbed, a confession that in any private company would see the board defenestrated before lunch; in Washington, they simply raise the debt ceiling.

https://www.gao.gov/blog/nine-ways-congress-can-combat-fraud-federal-government