But the bribe amounts have very little to do with how unfathomably rich the "donors" are! If you look at all those bribes, the amounts are still within the realm of what the 99% could put together.

But I don't even think it would cost the 99% that much, because it would force the 1% to up their game (in other words, there'd be bribe inflation) until the 99% can't follow suit, which means the 99% wouldn't even need to pay, in the end. But the higher price would make some bribers think twice, which might lead to less bribery happening.