I don't know if it's as true or not now, but the entertainers have become much posher recently: http://www.telegraph.co.uk/education/educationnews/12170357/...

When actors and pop stars come from such elevated heights, I always get the impression that they are slick and professional - but much blander. For instance, the music of the 60s and 70s - when classes were mixing more - had more dynamism.