Earlier quoted context omitted.
Do you seriously think the quality of life wouldn't deteriorate rapidly if this was the case? Or is that not your concern? Or would it not effect your area, so you don't care? I think it's utopian to believe that this would lead to anything but slums and shanty towns. People with no wealth will all flock to areas with wealth, which won't have the infrastructure to support them. They'd camp out wherever they could wit…
It's certainly not ethically sound to lock out people from poor countries just because you don't want them to be poor nearby.
People will find a way to keep people they don't want near by away from them.