If you want people to vote at over 90% you need to make it compulsory as Australia does. IMO the problem with doing this is that the people who don't care or don't believe it matters are now going to be annoyed that they have to do it. They will vote randomly, or just pick the first candidate listed, etc. just to be done with it. I saw the same behavior in school by kids who didn't care about the standardized tests they had to take. They just filled in bubbles on the answer sheet at random.

If you don't care enough to inform yourself about the candidates or at least have a party affiliation, it's probably best that you don't vote.

This is nulled by randomizing the candidates position on the ballots.