Flight attendants--the majority of whom are women--when on duty get no pay until the plane pulls out of the gate. "I don’t know another job in the world where you can show up, clock in, essentially, and just not get paid."
https://www.vox.com/money/369808/flight-delays-airlines-flight-attendant-pay
The hidden cause behind your miserable flight delays

Flight attendants are underpaid and overworked — and that hurts passengers, too.

Vox

@amydiehl I worked several jobs in retail that would do this. You have to get there at a certain time, usually half an hour before opening, but you didn't start getting paid until it opened.

This should very much be illegal..