Corruption in the US looks different than in say China. Its puritan corruption. Convincing true believers that what's good for big corporations is good for everyone and for the all important jobs. Everything starts from there.
As someone said higher up, the reason nothing is ever done is because the congressmen's incentives align with the banks and the power brokers. The only solution is to ensure that those with voting power in Washington have incentives that are the opposite of the banks. Term limits do not do this.
Possible solutions: Pay Congress and important oversight positions a salary proportional to their importance--somewhere in the multiple millions per year. Make lobbying any government official illegal (anything beyond writing a letter to your Congressmen). A lifetime ban from working for any company that is affected by decisions made while in office. 100% publicly financed campaigns.
http://www.pbs.org/wgbh/pages/frontline/business-economy-fin...