The tale of two Davids (Cameron and Beckham) and our social mobility problem

One David was born in a terraced house in East London, his father a kitchen fitter, his mother a hairdresser. The other David grew up in an idyllic village in the English countryside, his father a stockbroker, his mother the daughter of a baronet. The first David left school at 16 without any qualifications; the second studied at Eton and Oxford. One married an Essex girl; the other married the daughter of a wealthy aristocrat.