there are many africans that are living that life, just like there are many others in latin america, india, and south east asia that live in extremely fertile land and own land and a home. the reason they get sent is because they think that sending money back, even with wage-slave wages in the west will go a long way back home. many migrants have land or family that own land back home, they send money back to buy more land or build a house, sometimes those family members take the money for themselves. sometimes migrants in the west buy too much land in their homeland causing extremely high land prices a normal person who stayed can't buy, so they end up sending a family member to the west to compete with others who have family in the west, and so on and so forth. this basically snowballed to the point that you have most people from third world countries that know or have direct family members or friends that send them money to buy land/build house/or even fund a business.  they're basically fucking themselves over by competing using family members in the west, and these countries don't care too much either, they get a nice taxed money streaming.
United States