The major problem–*one* of the major problems, for there are several–one of the many major problems with governing people is that of whom you get to do it; or rather of who manages to get people to let them to it to them.
To summarize: it is a well-known fact that those people who must *want* to rule people are, ipso facto, those least suited to do it. To summarize the summary: anyone who is capable of getting themselves made President should on no account be allowed to do the job. To summarize the summary of the summary: people are the problem.
Douglas Adams, The Restaurant At The End Of The Universe