Not sure if my reply will be highly popular but please permit me to use this analogy MIRACLE DAY,
so u can ask, 'why does this rich man have a better car, nicer house and a fitter wife than me'?
people with money get better education because yes it is a cliche but money does make the world go round.
going to a state school doesnt justify your future no no but it is your hardwork, avoidin unnecessary nights out... and one day you will have a FITTER WIFE and ur kids can go to private schools.
As at now the government could subsidise private schools BUT there is NO MONEY.