Since you are fishing for opinions, here are some.
1. The notion of discriminating against children from certain families is ridiculous. We all know of boys from “simple” families that progressed to becoming true bnei Torah, talmidei chachomim, and stars in their communities. We also know of those boys who come from star studded families who are, well, ordinary, and certainly not remarkables.
2. The idea, which exists in some communities, is plainly stupid. These kollel families are generally unable to pay the exorbitant tuitions required to keep up a yeshiva. The option of making this venture into one that the public will fund through tzedokoh is foolish, as there is a shortage of such funds today, and many baalei batim (I know many) would categorically refuse to sponsor or subsidize such a project.
3. It is high time that the chinuch world stop deluding itself that it can be consistent with Torah values while rationing Torah education, and that it can morally use exclusionary criteria for its admission policies. Yes, in the free enterprise system one may do whatever he wants. But how about Torah morality as the yardstick?