Oh cry me a river
Tell you what, I'll come over and move in and we'll see just how much you like that. your argument is absurd, ever thought that by putting up a fence Mexico might be inclined to start fixing their own problems? They have the resources yet are one of the most corrupt governments in the western hemisphere.
Gee I wonder why they coudn't get a work visa
But using your examples we shouldn't even secure the borders, why do that and keep out more hard working people who went through a lot of s*it getting here?