“. Many of these people go home every year or they just come here to work.”
No, they come here, and STAY here for the 20,000+ per year(family of 4) welfare benefits. This is one of the reasons California is bankrupt. They not only stay, they bring their relatives over here, once they are settled in.
That is what I used to think, but I can tell you in the Carolinas when a large chunk of these people lost their jobs they went home according to official reports and
my unofficial observations. (I was a bit surprized by
this to be honest with you.)