I *do* insist that the problem is with the voters. If the voters were that irate about the politicians, they'd vote them out. Even if the new ones were just as bad, the voters would express their ire by voting them out, too.
Political donations don't buy votes. No politician is going to risk going to jail for taking bribes.
What political donations buy is the election of candidates who are sympathetic to you without having to be paid. They can't give money directly to the candidates anyway. The unlimited funds go to "uncoordinated" separate groups who spend it not on limousines and fact-finding tours to tropical islands but on campaign ads.
That's the point of connection. They're not buying the politicians. They're buying the voters. And they're buying them not with money, but with whatever tools of mental manipulation the ad-makers can dream up. They spend the money to blanket the airwaves.
All the voters have to do is to think, question whether the ads are telling the truth, and wonder why if they can form an objective picture from two biased, manipulated sets of mutually contradictory ads. That doesn't seem like a lot to ask, but the fact that the incumbents are repeatedly returned to office is a strong clue that they're not.
Maybe it would be futile and ineffective to keep turfing out politicians in favor of new ones. But it's not an experiment the voters have tried. If they did, maybe the politicians would change the way they operate; I don't know. I do know that your picture of how the process works is deeply flawed, and most voters seem equally uninterested in actually learning how it does work.
Your outrage at the politicians is too easy. They're doing what the voters tell them to do. If the voters are doing what the money is telling them to do, don't tell it to the politicians, or to me. Tell it to them. If you can figure out how to get them to listen, I'm all for it.