@CantStopMoving
"this ‘who you know’… what does that mean? I went private and all my friends were the children of teachers and accountants and middle managers. The same for my children’s friends."
You may feel relatively 'average', but you're not. You're well off. Your children are being educated in a privileged ghetto, where all contact with serious disadvantage - by which I mean children coming from genuinely poor and chaotic homes with unsupportive parents - is entirely absent. 3/4ths of children at private school are drawn from families in the top 3 income deciles. The fact that you're not aware of the degree of your privilege is a sign of your privilege.
According to the IFS "only about 4% of fee paying school's financial turnover has been devoted to bursaries, while just 1% of private school pupils have been educated for free. Bursaries, therefore, are too small to account for much of the participation by low- and middle-income families, or to be reducing substantially the concentration of access in high-income households. Rather, the participation of households below the top income deciles is enabled through their family wealth, typically including grandparent contributions."
"My children will get the same academic results whether we went state or private."
Research by the Sutton Trust points to children at private schools getting better GCSE and A level results than similar children in state schools, which is why they're over represented at top universities, in senior jobs and in elite professions. Privately educated children also earn more over their lifetimes than their peers from similar backgrounds who attend state schools.
Hence this suggestion from the IFS report:
"What may sometimes be important for subsequent success may in part be, not so much the sum total of the skills acquired through education, as where a person stands in the educational achievement ranks. With private schooling sorting access to scarce university places and to scarce entry-level vacancies in jobs with good career prospects, the advantages from a private schooling are disadvantages for those with state schooling. To the extent that this is true, private schooling has a private benefit but no social benefit, and underpins a sub-optimal allocation of talent to jobs in society." ]
In other words - in the long term your children's gain is a loss to a similarly bright child with fewer resources allocated to them in the state sector.