The problem with this approach is that it immensely devalues non-knowledge-based jobs, which still very much serve as the backbone of our infrastructure.
The other commenter makes a good point, but I also think we simply acknowledge that there are some jobs that do not require a full college-preparatory education. There are some trade schools available, but these are generally viewed as being for people who couldn't cut it, rather than people who have decided that the university route probably isn't for them.
I would imagine bringing back "shop class" would be a good start. Or allowing students to take electrician, plumbing, etc classes at another school for credit would be a good start.
I much rather would have taken Electrician 101 than Introduction to Percussion in high school.