Phasing it in at 10% increase in total immigrants per year would be fine as well. Many of the people living in shanty towns are victims of failed institutions,

Phasing it in at 10% increase in total immigrants per year would be fine as well. Many of the people living in shanty towns are victims of failed institutions, corrupt leaders, and oppression. With this removed their resulting standard of living would likely be at least middle class. The lazy and unmotivated from those nations would stay there, and the motivated would arrive on US shores ready to improve things for themselves.