Seems like the biggest issue is that employers are not willing (rather than unable) to re-train a workforce to be competent at new jobs, or to make the jobs attractive enough for people to want to work them. The answer from cops very often is the imported supply of labor.

If we can presume that the skills currently available in the workforce do not overlap with the skills demanded in the workplace, re-training would both benefit the underemployed as well as companies. Sadly, re-training is not often seen as a solution.