This is fairly speculative, but I have been thinking this paradox over for a while. A high demand for scarce highly skilled workers must drive salaries up in competition. Unless the skills are not actually high skilled, but obscure skills . I predict that "high skilled manufacturing" is a morass of proprietary solutions to highly specific process needs - that is, the metal fabrication plant alluded to at 10USD per ho…
Come to think about it, it isn't obscure skills, it is obscure knowledge. The problems are (a) there is really no skill involved, (b) the knowledge involved is specific to a proprietary machine and proprietary program, and (c) the training courses are training specific knowledge, not the principles and cross-training that would apply more universally.
Mapping to our (geek) world, training obscure knowledge vs. actual skills is all the "office productivity training" that goes on which really is "which buttons to click in Excel"... leaving the trainee helpless in LibreOffice because the button is in a different spot and possibly labeled differently. Note that the trainer is not entirely at fault - I've been amazed at the number of trainees that cannot generalize.