where do you think those people would(want to) go?.
plus, with the donor fatigue going on now, it would be way to criminal to start bullshit of that magnitude.
that's only touching on the humanitarian side of things but what about the economical one?; what's to gain here and who'd be willing to front the expenses?.
under some ww3 scenarios or some decades later and in a peaceful manner, it might happen; else, no way.