I think concentration of power is a bigger problem than "mob rule". If certain people or groups are able to acquire the majority of the power in the system, the

I think concentration of power is a bigger problem than "mob rule". If certain people or groups are able to acquire the majority of the power in the system, then the egalitarian ideals of decentralization are lost. You have just traded one power (e.g. banks) for another (e.g. the big miners).