First of all, in no way did I intend to intone that a child should be sent home. That is a question for an adam golol and not for me. I too would assume that one may not. I was not even offering an opinion regarding the posters particular story. None of us know the full picture and therefore have no right to an opinion. My post was nothing more than an indignant response to the character assassination of our mosdos hatorah. I am not familiar with the inner workings or ideals of the more modern mosdos and can only speak from experience in what most of us would refer to as mainstream mosdos.
I agree too that once a school fundraises they have an obligation to the tzibur. That said, fundraising is a tedious task that brings in a fraction of what it needs to. There needs to be a system whereby the parents are obligated to make good on their portion.
Additionally, my number of 40% is not across the board. I have personally reviewed the budgets of mosdos and spoken with roshei hamosdos regarding their budget and that seems to be a fair average. Girls school maybe higher, mesivtos sometimes lower. Modern schools or schools with very large classes more, high staff to student ratio less.