Cure the vices
Writing in the 18th century Edmund Burke reminds us here that it's hopeless to change just the politicians and financiers who are ripping us off, we have to go to the root of the vices.
This is because
Those who have been once intoxicated with power, and have derived any kind of emolument from it, even though but for one year, can never willingly abandon it.We can replace them, but we will only face their ilk again. So, says Burke, apply our remedies to the political vices.
For instance, change the way that candidates for Parliament are selected in Britain. Presently candidates are selected by a party. They would be far more likely to respond to the people they represent if they were nominated by a constituency-wide vote. This could help to break the power of the whips. As you recall, when the people wanted a vote on Lisbon and the party whips didn't, MPs were whipped into line and the people were denied the referendum they had been promised.
In America, end the selling of tax write-offs to special interests by establishing a flat tax. Break the link between earmarks and campaign contributions which undermines democracy.