I hear you, but I use to hire a lot of workers. I had a hard time finding people who didn't mind getting their hands dirty, and who had some mechanical aptitude. Yet, for the workers I was hiring, those skill sets would pay 30-50% more than a basic laborer.
First job as an engineer out of college I was walking the production line. One of the cute workers called me over and said her machine was not working right. I had never seen the machine before, she was just trying to flirt with the new engineer probably. I asked for an allen wrench, made an adjustment, checked it out, made a further adjustment, and then the machine started making good parts. The worker and all the other ladies around her were shocked that I could figure out something I had never seen before so quickly.
The downside to that story, though I never got dinged for it: No telling how many rules I broke in that union shop making that adjustment.
Part of the issues we have with finding good workers to build our trucks is this same issue: No one learns these skillsets as a young person. How many of you had an Erector Set growing up? Legos do not teach the same skillsets as an Erector Set.
Logical progression of mechanical aptitude: Legos, erector set, bicycle, lawnmower, mini-bike, Mom's Mercury Comet, new GM product. Oh yeah, steam turbines, superabrasive grinding machines, and laser target designators for the F18. .