Politics is applied ethics. People are supposed to know right from wrong, be capable of applying this knowledge to the situation at hand, and act on this knowledge and this capability in the political sphere, in particular, as voters. When they no longer do, but choose instead to vote for whatever they find pleasant, or fitting their lifestile, or profitable for a particular group they associate themselves with, the democracy goes and the tyranny comes. The tyrant may be immoral to the core, but at least he has the political instinct to tell him that he is going to lose his head once he crosses certain lines. If this does not make him morally superior over an electorate believing in your democratic ideal, it certainly makes him practically superior, i.e., more viable.