Lawrence Lessig says that's where the real money problems lie:
Forget the 99 percent. We are the 99.95 percent of people who have never maxed out in a Congressional election campaign by giving the maximum amount. It is .05 percent of America who have given $2500 in the last election to a Congressional candidate, .05 percent, and Congress listens to them.
Ari Berman backs his numbers:
The financial sector has spent more money on campaign contributions and lobbying than any other sector of the economy—$4.6 billion on lobbying since 1998, according to Open Secrets. This year, commercial banksand securities and investment firms have spent over $82 million on lobbying, employing over 1,000 lobbyists.