Make a new party for which the only policy point is to change the voting system.
Say "vote for us and we change the voting system and the immediately resign and make way for a new vote".
But the people don't want that, because they get played against each other.
Imagine you where in their shoes and you do value human life. What would you realistically do? Honest question, I'd like to think I'd do something different then them, but I can not think of a way that does not cut ties completely. I think the best I could do, is secretly support opposition behind the scenes, not sure how much of that is happening though.