The bipartisan system is evil in and of itself. There is no way that two parties are able to completely adequately encompass all of a culture's views, and no way that the people who are the main funders of the parties in question don't have a tremendous influence on what those views are. Most people buy into the two party system and so, although unintentionally, most Americans support evil and corruption in the government.
Most Americans do not support evil and corruption in the government. A vast majority of the Americans that I know and associate with generally believe in the good part of human nature. They do not condone at all the large amount of corrupt behavior that goes on in the government.