One major reason that people don't vote is the lack of incentive!!!
Why an average person has to spend time and effort on voting but seeing no reward? Don't tell me the long-term benefit of voting. Average people don't give a shxt. This is somehow a design failure of voting-based DAO. (Just like the idealistic communism, which is also a failure in mankind history.) In sharp contrast, mining gives strong incentive to average people to work on it (even for people have no technological background). You need some kind of incentive to average people to vote. Not just give to the 'delegates' or 'witnesses'. One possible solution is to give reward to those who vote. I don't know what it is. But incentive is a must!