A good system of government is resilient to bad leadership.
Edit: do any of the down-voters care to explain why this is not the case? Stable is generally considered a prerequisite of good and history indicates that not going totally down the tubes when you have a bad leader is a perquisite of stable.
The Roman empire lasted a pretty darn long time even with a lot of mediocre leadership. Various flavors of representative democracy seem to weather crappy leaders pretty well.
Edit: do any of the down-voters care to explain why this is not the case? Stable is generally considered a prerequisite of good and history indicates that not going totally down the tubes when you have a bad leader is a perquisite of stable.