I went and looked at a building associated with a local independent school yesterday, as it's always piqued my curiosity.
The school is run by the Woodard Corporation. I looked at their books on company house yesterday.
The amount of money moving through them is ridiculous. If people want to pay for a private education, then surely the institutions should be taxed.
Apart from a small number of scholarships, the average person is not benefiting from these institutions.
In the case of Eton, as pointed out on another thread, these schools are probably leading to damage to society and definitely do not promote the idea of equality.