Happygolucky: yes, I also know you have to be 'very bright' to get into Westminster, St Pauls etc., as you have to be to get into a super selective grammar school, and I also understand that you can't buy a place as you have to be very clever in the first place. I think that point has been made over and over again.
You are missing the point, big time.
Generally speaking (taking out the minority, i.e those on free school meals/bursaries/scholarships/Prince Harry) 95% of people can't afford to pay for education (also taking out purchasing of flatscreen tvs/foreign holidays)however much they scrimp and save.
Some people may think that's great. I happen not to.
Luckily the state grammar schools do give a chance for some children to compete on a level playing field for university places. Not everyone has 'bought' their places there either. There are actually some children who get in on their own merit, gaining places over the ones who have been highly tutored.
As we have all said, it is not black and white, but the simple fact IS that only about 5% can afford to pay for private education, and those children are disproportionally represented at top universities.