Thankfully, we live in a democracy with elected representatives as opposed to hereditary feudal lords and kings. Resultingly, most politicians do actually have backgrounds and experiences that are "normal." They are no less removed from daily considerations than other members of the salaried, professional UMC, for the most part.
People can lose track of these things if they've been moving in rarefied circles for a while, though. "Don't forget where you came from" is a set phrase about newly-successful people for a reason.