I have absolutely no problem whatsoever with the existence on public or private schools.
What I do have a serious problem with is how they, via selecting out, are in a position (that just about any school that was allowed to 'select' would be) to get their charges higher grades in public exams than they would have achieved without their private education.
As a result, many of these DC....
-who would possibly sink without trace in the rough and tumble of a state school (how many MNetters do we endlessly read about on here who've moved their DC out of state schools because they just weren't coping??);
-whose academic performance would be distinctly average if they didn't have a teacher standing behind them every step of the way, a teacher who taught 10 or 15 DC instead of 30, who didn't have a 'I'm paying your wages' parent standing behind them ';
........ find themselves being offered precious, limited places in Russell Group universities, places that will lead them to great degrees, then jobs-that-pay, which in turn buys power, then allows them to perpetuate their privilege.
Until universities make relative offers to DC based of the quality of their education, I will continue to have a problem with the existence of private and public schools. And see how private paying parents who are absolutely only sending their DC because of the marvellous sport/drama/music facilities howl at that idea! True colours, anyone?
Incidentally, before I get the 'bring back the grammar schools' (to give the hoi-polloi a fighting chance) debate, I might be slightly more in favour if:
a) the 'pro' campaigners were championing the Secondary Modern in the same breath and
b) if many GS's intake weren't pretty much exclusively from the local prep schools
c) their DC's uni offers were also made relative to the quality of their education, too,
oh, and d) if they weren't so utterly socially divisive. Like private and public schools are. ( I speak as ex GS, one that is now bulging with said privately prepped DC..)
Finally, if I could afford it, I'd've sent my DSs private in a shot if I hadn't managed to get them into a very good comp; however, I'd rather live in a society that didn't allow one group, via its financial muscle, to so blatantly buy otherwise perhaps unearned advantage for its own DC over another's. Just because 'I'd like it', doesn't mean I should be allowed to have it.