Part of the problem is that Americans feel these types of jobs are beneath them. So they turn to welfare and/or crime and the illegals gladly take their low-skill jobs.
I worked in a hospital for many years and there were quite a few jobs that didn’t require degrees. People worked in housekeeping, transport, central supply, and in the kitchen and cafeteria. These people were usually well respected members of the hospital’s work family and a few of them became Employee of the Year.