There is only one positive outcome of concentrations of power, and that is efficiency in execution. Which is extremely scary when combined with huge power.
This is really just the democracy discussion with different terms. It is well known that dictatorships are much more efficient at executing their plans. The inefficiency we voluntarily introduce when establishing and maintaining a democracy (and if you have ever been involved in democratic decisionmaking, the inefficiency can be really frustrating) is the price we pay to insure us against the efficient abuse of power as we have witnessed it countless times in human history.