The requirement should be that any time an employer makes a demand of an employee’s time, they pay.
FA waiting on your plane to arrive that’s 6 hours late? Pay up.
15 Apple store employees lined up and waiting to get searched by a single manager after a shift? Pay up.
Require an employee to respond to phone calls or issues after hours? That’s not “after hours”, that’s hours. Pay up.
Make an employee commute to an office for a job that can be accomplished from home? Believe it or not, pay the hell up.
Making demands of a person’s time for a job is part of the job. They should be compensated for it.
Correct. In the US, these practices are commonly not paid by employers.