I'm inclined to think that there ought to be a four year college degree that teaches a number of different trade skills as part of its core curriculum. A student in such a program might take history and mathematics courses similar to other college students, but would also learn concrete skills like welding, electrical wiring, HVAC, etc. The goal would be to have a graduate that might be able to find work in a variety…
For instance, I'm glad I took some economics classes in school, but in no way am I prepared to work in that field.