A real example of what I think PFife is talking about (I think):
There are a LOT of people (including very smarts ones) who think that we are screwed whether we have a democracy, a dictatorship or something in between because of global warming. They think that neither party comes close to addressing the issue in a meaningful way. Why should they vote for either party? I'm not really with them because I don't know enough about it to know how bad it's going to get or how, so I vote for a democracy. However, if I shared their dire views, I sure wouldn't worry about our form of government over the world surviving.