The only thing that would be a best case scenario is if their home countries grow some balls and murder their shithole-enabling governments and other exploitative multinationals, preferably without big ol' Murrika needing to fly in to do so (because we all know how that ends every time in the last 70 years.)
They all need serious incentive to go back home. As it stands, their countries are socially and politically engineered to forever remain Hells on Earth until a paradigm shift happens to put an end to the third-world fallacy.