Technically, that's not corruption. Corruption is when you secretly take bribes. If you openly follow policies that favor big business, in hopes that they may make contributions to your campaign, that's just politics. Voters can always vote for the other fellow.
It is failing to act in the interests of the people in general. That, however, is properly left to the voters to punish because that is subjective. Maybe what's good for billionaires is good for the U.S.A..