Well, of course it was not intended to cover them all. Just something I found. I think a lot of it could be that Americans are spoiled and believe that they should make $20 per hour working at McDonald’s. I’ve built scaffolds, poured concrete, done remodeling (including roofing which I hated), was a swamper for pipe liners, and dug ditches for plumbing. I ended up inspecting, which kept me out of the weather and saved my back. Worked beside blacks and Mexicans, but never encountered any other races doing the manual labor jobs. I would like to see what these jobs are that Americans are not being hired to do. If they’re high tech or required educations, maybe we should stop graduating high schoolers that can’t read, write, or do even basic math. Colleges aren’t doing much better. Just me two cents.