In a perfect world...
the public servants should be the most efficient people in their community.I guess that in such kind of society, there would be necessary a law to 'obligate' those efficient people to work for the community for a giving period of time before being replaced, meaning, people really efficient would be more interested in other things than running public services, or in other words, we keep elected politicians for lack of good alternatives and therefore, we base our leaders selection on promises and agendas of groups of interests.