I've always thought that too, Cluin. The wizarding world is chocka with Muggle-borns. If you were going to run a Ministry, would you appoint people like Mr Weasley when they haven't got a bloody clue? Appoint a few Muggle-borns, who can change a plug and even know how to operate a microwave. Problem solved.

It's one of those places where the conceit unravels a bit for me...