For the most part, a good leader (only considered a "dictator" when he doesn't give a flea about his country) can do a lot of great things without a bureaucracy slowing them down. Unfortunately, statistically you can only go so long before a bad leader shows up eventually due to complacency, temptation and/or blackmail. Then you eventually have to implement "clean up on aisle 17" which appears to be the point we're at now, but literally on a planetary wide level.