I don't doubt there's a correlation between some aptitude that measures propensity for success and SAT score, but I'm still struggling to see how that benefits the poor or the migrants in general? In truth, it benefits a narrow section that "fit the mould" that is expected by success on a SAT; that is, members of the notional outgroup that do the SAT in the expected way can benefit, those that don't still fall by the wayside.
There are very many intelligent people that for whatever reason - cultural, bad parenting, poor education - still fall to achieve this mark of success. Is that acceptable? I think there's at least scope for saying that maybe a SAT is not the optimal strategy for finding all those that would benefit most from higher education. I've no idea what is, but there seems to be some very strong opinions here that don't seem particularly intent on seeing the bigger picture.