It's very telling that in the host of reasons this person gives for the so called "shortage of labor" (which is actually a shortage of an industrial reserve army), not one of the is stagnant salaries.
No one is willing to admit that in most areas salaries are stagnant when compared to the enormous growth in labor productivity and cost of essential goods and services (food, housing, education, etc) and that's the root cause of a resistance or workers to enter the "reserve army" in those areas. Simple like that.
Increase pay, and people will join. If you can't increase pay enough to find employees, then your business isn't viable and you need to do something.