Comparing "plenty" to "not enough" is what went wrong here. Clearly there's "not enough" money if there's "not enough" workers. A labor shortage is what someone

Comparing "plenty" to "not enough" is what went wrong here. Clearly there's "not enough" money if there's "not enough" workers. A labor shortage is what someone calls a compensation shortage when they're the ones providing the compensation. If I'm being generous, the "shortage" is referring to supply and demand: if there were more laborers, they'd be cheaper to hire. In reality, a person only has so much time to offer for someone else. This is where the idea of a minimum wage comes from. An individual's time is always worth "at least this much". This is plainly a case of not enough money.