Lawrence Lessig:
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.
These few don’t exercise their power directly. None can simply buy a congressman, or dictate the results they want. But because they are the source of the funds that fuel elections, their influence operates as a filter on which policies are likely to survive. It is as if America ran two elections every cycle, one a money election and one a voting election. To get to the second, you need to win the first. But to win the first, you must keep that tiniest fraction of the one percent happy. 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.