Here's a perplexing riddle...?

Cuz they left sh*tholes...?

They do strengthen their own, they send vast sums of money back to their families which get spent in their own countries..

Because we have the better system where they CAN  get ahead. 

In the countries they are escaping from, they don't have the same opportunities or have to deal with outlandish corruption or gang violence. 

Here........they can come here, and just open a Chipotle or something......and no one bothers them.