They're just doing the jobs Mexicans don't want to do.
Even Mexicans wouldn't work for those wages. Indentured servants is probably the best term for a lot of those people.
Living in Reno, Nevada, the few times I go down to a casino with my wife, we see a lot of Asians gambling as if the next tsunami will be tomorrow. They can't get the machines to take the money fast enough.
I'm not sure where they come from, San Francisco and Sacramento I presume. They sure don't like men in wheelchairs that's a fact. We move too slow for them, I guess. Nor do they enjoy having someone who will cuss right back at them. LOL
** guffaw **