This is the fall out from Furlough.
People on it which was fine whist their industry was shut down.
Many found alternative employment and had 2x incomes at the same time.

Most have stayed on with the new seemingly stable employment and not returned to the original Job when that re opened.

I don’t blame them looking after their own and they doing nothing wrong, but its it’s added further strain to those economies who can’t operate properly because of staff issues and people not returning to the job or industry.