By "better educated" I meant having broad knowledge of a range of subjects, having been taught to think logically, analyse an issue objectively and present an argument persuasively. That does not necessarily depend on which school someone went to, but going to a school or university which can consistently instil those in its pupils is likely to considerably achieve ones chances of acquiring them.

However my real point was that politics is a profession which requires a certain amount of intellectual ability (although some do a very good job of concealing this). The idea implicit in the original question, that the composition of parliament should somehow reflect the whole of society, is misguided. Some members of society are, lets face it, thick as mince, and whilst that does not disqualify them from being decent people it should disqualify them from being MPs.