Jothar said: “Tuition breaks are a form of tzedakah”
As such one should do anything to stop/reduce the amount of the Tzedaka they are taking. As per the following (Rambam Matnos Aniyim Perek Yud)
?? [??] ???????? ??????? ????? ???????, ??????????????? ????????, ????? ?????????? ????????????, ????? ?????????? ????? ??????? ??? ??????????; ????? ?????? ???????? ?????????, ?????? ?????????? ??????, ????? ??????????? ????????????. ?????????? ????? ????? ??????????, ?????????–??????? ????????????, ?????????? ???????????? ??????????; ????? ?????????? ????????????: ?????? ????????? ??????? ??????????? ?????????, ????? ?????? ?????, ????? ????? ???????? ????? ???????? ?????, ?????????????; ????????? ?????? ????????.
?? ????????? ??????????–????? ????? ???????? ??????, ??????????? ??????????, ??????????? ???????? ??????????, ?????????? ?????????? ?????????????; ????? ???????? ??? ??????????, ????? ???????? ????? ?????????????? ?????.
The only argument I have heard is that there is no way someone in Kollel (with no skills and at best a weak high school education) can make by working what they make in kollel (off the books, MOFES & other government help, as well as discounts from stores), so they may as well stay in Kollel.
Aiyzeh Hu Chacham Haroeh Es Hanolad.
I (personally) have given up on others doing what is right, I can only do what is right myself (and perhaps convince others or at least give them enough doubt to ask a non-nogayah Rav).
BTW MO schools have more frills (gym, band, sports teams, etc.) so their costs are higher. They also pay better (which is not a bad thing, as they can get better rabbaim & teachers).