If the many have the control then it is hard for any one individual to gain control and rig the system for himself, because the many can kick him out

Have you never witnessed “the many” being manipulated by a small number of people into doing things that are against their best interest? There is nothing “natural to the system” that protects against this. It is just hope that the many will stay aligned with the goal of the system. And that each generation keeps this alignment.

You build your system on a set of rules, but then you need to maintain that system. If you don’t, the system will warp.