The difficulty there is that the best way of getting voters to the polls is to stop being corrupt and start actually representing their interests (as was demonstrated in the states where Bernie wasn’t crippled by closed primaries or media blackout).
Disillusioned non-voters ain’t gonna turn out for the slightly-less-bigoted plutocrats that the corporate Dems put up. The experience of the last forty years has shown that doing that just gets you a slightly smoother slide towards peonage, and the urgent existential threats of the modern reality make long-term incremental strategies suicidal.
It’s a bootstrap problem.