How is that a problem?
Assuming a democratic system that is practically a built in condition of the system.
The question should be what do the limits of that system have to be to make that less of a problem.
I think classical liberalism gave an excellent answer and it definitely had the right approach. A systemic problem needs a systemic answer, for there will always idiots.
edit: and there is always the question of rational ignorance. In most cases it would be waste of time to care about the issues you vote upon.