“For myself, I want no advantage over my fellow man, and if he is weaker than I, all the more is it my duty to help him.” —Eugene V. Debs
I disagree with your premise. But I think the answer is simple. To get the political system closer to your ideal, you organize. You organize in political primaries, over specific issues, in the community, with a variety of organized groups, etc. If you're able to build broad popular coalitions better than your opponents, then you'll move the system.If you don't do the hard work of organizing, you won't. If you're unwilling to work in broad political coalitions in which many people disagree with you about important issues, you won't move the system either.