Joseph, GAW’s point is a good one, as I have said. This issue can be addressed, and perhaps my quick reply was somewhat on track to a real solution. I’d just like to address the rest of your points with a few bullets:
1) It is not funded vis-a-vis wealthy parents. It is funded through all parents. Every parent is required to pay full tuition + subsidy (an amount that, if paid by all, would far exceed the needs of the school). It is then up to the discretion of the school to decide how much of a “break” the family deserves based on their assessment of how “wealthy” the family is. This involves divulging a lot more personal information than one should have to (indeed, more information than is currently needed to run for president of the USA). I hope you can see an alternative now.
2) I believe I have addressed the point about those who CANNOT pay. I said that a) the family must be required to bring in a reasonable amount through their own fund raising and b) there must be grant funds available for such families to cover the shortfall between their fund raising and total tuition. I think I gave a lot of detail about how those grants could be funded, too.
3) We can “enforce” the communal responsibility to fund yeshivos by having community affairs and fundraisers (that raise money for the grant programs). Though fundraising through such entertaining means as a concert or the like may not seem like “forcing them to pay their due”, it accomplishes the same purpose. They are supporting the yeshivos. Better yet, they are doing it happily.