One thing I really don't understand about this movement to get money out of politics is what the alternative is? No money in politics? Well clearly someone has to put money into politics or you'd never see signs up, you wouldn't see commercials, politicians wouldn't have websites to post their platforms on, etc.
It seems to me like what people actually want is better politicians and the influence of money is the current reason to see politicians as poor. People have always hated politicians though, didn't we have Nixon before this big money kick? What about Herbert Hoover? Surely he'd be accused of some corporatist agenda today for his blunders.
It seems to me if you don't like how politicians behave and are influenced that the solution is to reduce their power and influence. If, and it's a big if, money is the problem, the money will stop flowing if the benefit of spending it drops. The larger government gets, the more power we give our politicians, and the more beneficial spending that money becomes. Remove the incentives and this problem will fix itself. That probably means many more complaints about why we don't have specific social programs, research programs, defense budget and whatever else we spend money on, but it'll fix the issue of the influence of money.