Obviously the problem
with this is that grifters gonna grift, so $15 billion wouldn't be enough to make him stop, but the point is still valid. If possible, it'd be best to buy off our rulers with one giant lump sum payment than subject the country to various whims over chump change. The thing about corruption is that it isn't just about the money. Money, too, of course, but we can print as much of that as we want.
