It's a bit trite, but: Is it a shortage of labor, or is it a shortage of pay for labor?
I realize that other issues can come into play like barriers of accreditation, people not realizing demand exists, lack of funds to pursue education to supply the demand, or a perception that the whole career-direction is a "bad bet", etc... Yet once you've seen somebody say "labor shortage" to describe a situation where the pay is terrible, it's hard to un-see it as a kind of sneaky blame-shifting tactic.
Ex: "I can't find anyone willing to sell me a new car for $1,000! Clearly America is gripped by a devastating car shortage. Manufacturers must step up production, and the government can help fix this crisis by giving car-purchasers like myself a tax break."