I wouldn't see the issue here if the employer was willing to "pay handsomely" to have their employees work those hours. Some white collar workers work those hours every week - if not longer - and are paid well for it.
Unionization helps develop somewhat of a brotherhood to keep the nastiness at bay, but even then the members generally want to keep it an exclusive club, not something for all workers to join. As a result even union members still see external pressure from the workers outside of the union still trying to them screw over.
No, being comprised of humans, it absolutely doesn’t.