Many companies employ individuals who can't think for themselves and because they feel they have much to lose; they'll coerce their fellow co-workers because they are supervisiors or managers.
I'll give you an example. Say you have an individual that has to work 8 hours, but then the store managers decides to extend the individual an extra 2 hours for a total of ten hours! Why can't the employee chose to only work the 8? If he declines, the manager can fire him for insubordination. I was a supervisor for a corporation, and I use to hate forcing employees to extend. This is wrong. Why do companies treat us like slaves?
Corporations tell us that they care about work-life balance to appear good on the books, but they do this all the time.