How can you motivate anyone who just owns 1 or even 10 masternodes to participate, in the current setup/configuration? It's just a formality without any significance whatsoever.
This is the question people have been asking since the first experiments with democracy in Athens. Nobody has ever solved the problem, so I doubt we're going to either. The best anyone can come up with is: a) civic responsibility, b) sometimes your vote really does matter.
How quickly we forget:
https://en.wikipedia.org/wiki/United_States_presidential_election_in_Florida,_2000