private school. It is completely different from your statement. We studied private schools before sending him to a private school; never heard what you said. Maybe in your area or you kid's school? Or u just heard from others. If this is the case, do not talk to that person anymore; he is not your friend; he is a cheater.
As a matter of fact, I have some in-depth observations on the business model of private schools through out US. They may be diversified in the most superficial layer, but deep down to the bottom, there is a common line: money. It is not anybody's fault but they cannot survive without it since they do not have the mandatory public tax sytem to support them, and utilitarianism is essential for anyone to survive in private sectors.
Not sure about whatever model how private schools run, just share my observation that we have not heard about the thing you mentioned in your post. BTW, not trying to be offending or judegmental, just want to share my observation. Now from ur post i know some private schools are like what u said. Happy to know some new things.