The point you're missing is that it's not the system that concentrates power, it's the people. Systems, or sets of rules as it were, allow for concentration of power at varying rates, but no system has been developed that would put a stop to it. Socialism is the worst and encourages laziness and lack of productivity, so the people who are least suited to power achieve it.
Yes, people with wealth will always be influential. You think the world would be perfect if you controlled everything, which is hubris.
Getting rid of this system could also make things worse.
Sure, sure.