The problem with the Koch brothers -- or any major political benefactor -- isn't that they exist or donate money. Its when they do so through means which are hidden from view or which crush other points of view by sheer dollar weight. PACS and super-PACS that support a candidate without "officially" being linked to the candidate so no one knows how much is being spent, or from who, is where I think a lot of people have a problem. And that is true of Dems, as well. Same with the fact that those in power already, and with so much money at their disposal, can drown out others.