Law professor Lawrence Lessig, who specialises in openness and the fight against government corruption, in the Atlantic:

A tiny number of Americans — .26 percent — give more than $200 to a congressional campaign. .05 percent give the maximum amount to any congressional candidate. .01 percent give more than $10,000 in any election cycle. And .000063 percent — 196 Americans — have given more than 80 percent of the super-PAC money spent in the presidential elections so far. [...]

Just a couple thousand of them banding together is enough to assure that any reform gets stopped.

Some call this plutocracy. Some call it a corrupted aristocracy. I call it unstable. Just as America learned under the Articles of Confederation, where one state had the power to block the resolve of the rest, a nation in which so few have the power to block change is not a nation that can thrive.

And it contributes to a situation like the one Mitt Romney is in now, where his tax situation seems perfectly culturally acceptable to so many Americans. Well, perhaps just those Americans. This, from the Daily Show: