Total fee income from private schools is estimated at about £10 billion.
They educate 7% of the UK's children - 550 thousand of them.
That is directly saving the taxpayer £4.4 billion in state school funding at £8k per child.
Ie more than 40% of private school fees are actually a direct subsidy to the UK government, which is a pretty huge public benefit.
But actually, unlike pretty much all other charities - which benefit from gift aid on their income, and claim back all income tax - that is coming out of parents taxed income, taxed at least 40%. So actually it's £11 billion being handed straight over to the government, out of the £16.6billion any other charity would get to spend on their own charitable aims. Ie educating the children enrolled at that private school. The state is stealing two thirds of the money we pay to educate our own kids.
I don't think any other UK charity gives so much of it's income directly to the state - hence to every single UK citizen - instead of to its own charitable aim. Even without any additional outreach and support.
And that was before the 20% VAT travesty.
I have no idea why we haven't ever pushed back on how completely unbalanced the requirements on private schools have always been. Every other UK government has realised that they shouldn't fuck with something the UK benefits from so much. And somehow we parents all just accepted that this was the price we paid for getting to educate our own children. It's totally unjustifiable.