I've always thought the movie Starship Troopers had an interesting concept. Supposedly the book delves into it further, but the premise is that everyone had to earn their citizenship. You could live a long life, participate in society, and even own a profitable business without citizenship; but you couldn't vote unless you earned the right through the military or civil service. I wonder how different America would be today if you had to earn the right to vote. I bet citizens would take their responsibility to make informed voting decisions seriously.