Beautifully stated. I can only speculate, but I'd say the reason it is this way is due to the collective apathy/cynicism toward government. We have collectively come to expect a certain level of corruption and influence peddling. We have a high tolerance for incompetence in carrying out government operations. Only the most egregious offenders are brought to the public's attention, and in an age of increasingly short attention spans, people have forgotten by the time elections roll around.

That is, if they vote in the first place - in that example I gave above of a corrupt mayor stealing millions (Tiffany Henyard of Dolton, IL), the voter turnout was only 15%.