I’d like to think there’s a way to keep shitty people out of power and concentration of resources to a minimum, but unfortunately, that conflicts with human nature.
The people who have power are generally the type of people who want power over other people. We haven’t solved the problem of preventing sociopaths and psychopaths from becoming powerful yet, and it’s hard to believe that society will ever solve that problem, since sociopaths and psychopaths will always exist. People who care about others generally aren’t the type of people who seek power.
Even if, for example, we have a proletariat state, people who seek power will find a way to gain power. For example, if it’s a direct democracy without representatives, propaganda will be a very useful tool. If it’s a communist government with centralized planning, there will be a way to control the centralized planning. We already know how representative democracies can fall since we’re living it. With social democracies, capitalism still exists, so that’s pretty easy to exploit and revert back to straight capitalism.