No society can survive if it is composed solely of one type - philosophers, for instance. Most people work long hours and are not highly educated. They also do not have a liking of intellectual pursuits, many from childhood preferring to work with their hands.
We need them, for the rest of us would have to become hunters-gatherers if we did not have them, which means we would become them.
Some ask, why then allow them to vote, since they have only a limited understanding of the issues? I think I know why we should.
Most intellectuals become impractical, buidling theories that don't even have a hint of sand to hold the foundations, with others building upon them. The working class people are very practical and sometimes their instincts drive them in the right direction.