When people are paid starvation wages and have to have multiple jobs, that's brushed off as "supply and demand" of labor. You get paid what the market is willing to pay for your labor, and it's your own fault if you can't offer anything more compelling to demand a higher wage.

But when the situation is flipped around, and there is a shortage of labor instead? Suddenly the same rules don't apply, "supply and demand" isn't what should rule the price point for labor, instead, these companies are entitled to cheap labor. If people are unwilling to work for the wages offered, it's the people who are defect, not the wages offered.