There are a lot of places where the employer just brings in new people when that happens. Again and again and again. The well of people desperate enough for a paycheck just never seems to dry up.
Depends on the job - if it’s specialized sure. If its not then no, they just hire the next guy. There’s always a next guy because there’s always a supply of people looking for jobs even at minimum wage.
This isn't true in many areas. Even when I was in high school with zero experience it was easy to find jobs above minimum wage. Which means almost nobody wanted minimum wage jobs.
Not in all sectors. There are many low wage jobs that employeers don't give a damn about constant personel rotation because they always find people and the profits are up