Please, someone explain this to me.
They need immigrants to open up new bodegas in the hood they can rob and loot.
Follow the money.
Also there have good comments on the reasons
Remember those conspiracy theories about placing a single government in charge of the entire planet? It is really happening. First they must level the field for all nations; however, only the lowest common denominator can be achieved.
I suppose they get "buy in" from world leaders through threats or pay-offs.