Brain drain be like that sometimes

I'm responding to rustyfish and felykiosa. People from French colonies are French citizens and can therefore comparatively easily emigrate to mainland France.

Backfires as in every country can take a limited number of migrants and usually try to reserve most of their capacities for people who actually need them (people fleeing from oppression, war or other life-threatening situations) instead of taking many people who just come for the better economy (this way the economy in their homecountry won't get better)