Without some people… most Yeshivas would be closed withing a few weeks.
*kapusta*
You write “some people” but we can say more precisely “secular Jews”.
Without the generosity of secular Jewry, most Yeshivos would have closed down long ago. The famed Roshei Yeshiva (including R’ Aharon Kotler) did not limit their fundraising to yeshiva alumni simply because we don’t have enough money within our own circles to support our institutions.
As one R”Y so eloquently put it, “I teach my students to become bnei Torah for whom Torah is their livelihood, or [for those who will join the business world] to become ehrliche yidden. Either way none of my students will get rich.”