We'll just train them in the increasingly technological trades and other fields that require more reasoning and processing skills than before. Easier said than done. We see this at the 9-12 level of education. The problem is that many, many of these people lack those capacities. We just administered the ASVAB test a little while back. Do you know why that's administered? It's yet another renamed intelligence quotient test to make sure people interested in the armed forces meet a baseline of intelligence. When you convert it to a traditional IQ test, I believe the baseline is about 85 or something like that. There are a whole lot of young males with IQs there and below. The military learned over time that if you place people with low intelligence in the military, they cannot of greatly struggle to do their jobs. Now imagine taking those same young men, many of whom also have troubled home lives and few male role models of industriousness, and try to train them in technical jobs that require a great deal of reasoning and processing skills.
So, you take those people, many of whom hop from job-to-job and go through extended periods of unemployment, and you further shrink the number of jobs available to them by putting them in competition from unskilled immigrants. Does that make any sense whatsoever if you care about those folks at the bottom? I understand why the folks who use these immigrants for cheap labor love our current system. I don't understand why enlightened folks who have some affection for this country and the folks born here contort to find ways to explain why we need to continue to bring in these people. Unless it's just virtue signaling and/or scoring political points against the opposing tribe in pursuit of electoral success.