I, personally, think, it is because we have achieved first stages of Socialism in America.
Shortages and lack of workers are always part of Socialist economy.
Basically, all the government money printing, regulations and rules are coming back to roost.
Fixed it.
As the governments strives to achieve equity, it creates a massive disincentive to work, and especially, to excel.
As the Economy enters the socialist death spiral, the government comes with more orders, regulations and punishments. Blames hoarders and speculators. Arrests nonconformists. Prints money.
Lines starts to form, people start to starve. Nobody cares about anything, but where to get something to eat.
Looking forward to it!