This is an interesting point. I suppose the counter would be that we only want the politically informed people who would naturally self-select anyway. It shouldn't matter if there is a bias in previous voter-turnout as many of the previous people who did vote would now not qualify, and the non-voters just stay as-is. Anyone who abstains would also need to vote as abstaining to make sure turnout stays high. I'm just riffing here, getting deep into the weeds of how a potential system could work.