Well, IMO it is cross-border "cheap" labor migration worldwide managed internationally as "free trade" with developing countries is managed.
Rather than build their own economies thus benefiting their own citizens leaders of many third world countries push to provide "cheap" labor for advanced countries.
The benefit to the leaders is: they get to tax their nonresident citizens' earnings. That's right.
The source countries tax the income of their citizens "beyond borders". The host country gets the benefit of "cheap" labor and provides "human rights" such as jobs, health care, education, housing, and other human rights.
See Columbia University professor Jagdish Bhagwati campaign for a World Migration Organization.
Marker