There are way too many examples to validate the elite overproduction theory. Just right now we don’t have enough skilled trade workers to execute on the infrastructure plan. https://www.nytimes.com/2021/09/09/us/politics/biden-infrast...
I don't share the same sentiment that we don't have enough talented workers. We just don't have enough workers who are willing to work minimum wage with a $0.5/hour raise year over year.
Trade jobs require a certain amount of training/experience and pay far above minimum wage. A plumber did a job for me a couple months ago and the guy made six figures a year easily, I asked him. Right now getting any remodeling done in the Bay Area is impossible because there is not enough contractors; availability times are three months in the future and often you get outbid for their time.