While it&#x27;s true immigrants in the 19 and early 20th centuries were uneducated, they had a generation or two available to catch up.  In today&#x27;s day and age, they have a few years to adjust to this new reality.<p>It&#x27;s true that a good many could transition to other higher level jobs, but at that cost of labor, jobs will go to the domestic labor force.  I.e.  If I have a job where the going rate is 25&#x2F;hr, why would I go thru the hoops of sponsorship in one case and on the other hand running afoul of immigration law by hiring a worker who can&#x27;t legally work?  Foreign migrant laborers are on special visas and don&#x27;t transfer to other sectors.