> If there was really true 'progress', then you wouldn't need a one-party system that suppresses all dissent.

This makes no sense. It is possible for a totalitarian government which is threatened by dissent and concepts like "democracy" to also work in the interest of improving overall quality of life.

If things work so well that everyone's quality or life is improved, why would there be dissent large enough to worry about.

It's the same category as: Why would a company with happy well paid workers be worried about unions and try to stop them forming.