The US has a guest worker program, and there are fairly large numbers of guest workers here. Some feel that the statutory limit on the number of guests allowed are overly restrictive; but there are numerous legal "workarounds" that make the numerical limit almost meaningless. Academic workers, as a practical matter, are not subject to any quotas, and vastly outnumber the productive (attempt at humor?) ones.

And BWL falls back into the "all Mexicans are the same" trap on which I commented earlier. Mexican laborers are perhaps "over represented" in the construction trades, and most particularly in the home construction and repair lines; but the majority are legal workers, or at least show credible evidence of legal status, if the local trade is any indication. This, incidentally, is not a "job that citizens won't do," that is picked up by default by illegals. I've had numerous friends and relatives who were "over represented" in this line of work.

The pay is pretty good, in general, although the work is sometimes irregular and sometimes seasonal. That ethnic Mexicans are over represented in the field is largely because they're somewhat overly common in many unskilled and semi-skilled trades (often because of language difficulties, which sometimes persist into second and later generations). Construction carpentry and other home repair jobs do require a bit of skill, but it's fairly easy to pick up "on the job" and hence the "trades" are overpopulated with (especially younger) workers who haven't had formal training in a line of work.

John