That's why it works. If they stayed on top of things and didn't allow themselves to be influenced so much by TV ads (leaving the advantage to those who have or can raise the most money) and did more on the local scene, that is, took self government seriously, different people might get elected. Say someone who is perhaps ugly but is right on the issues.
The shallow nature of the average voter is what allows this, but they have the right to vote too. They don't use it responsibly. Listening to Beck and Limbaugh and letting that type of person influence you, that's lazy.
Most DUers would not fit into that category, but even here we often don't do a lot.
Jefferson thought that if every voter could read, all would be safe, but that has not proven to be the case. People don't take self government seriously and don't take the time to read and think about it, and let themselves be swayed by emotions and slick ads and slick appearances. This is where the problem should be seen and attacked. Ranting against the corporations and the banksters and the politicians doesn't attack the real problem.