I do not see how mandatory 4 weeks off (paid) are mutually exclusive with PTO accrual. In my own corner, I've been elected to a board to represent other employees. Something we're lobbying for is a certain minimum of mandatory paid leave - as well as circumstances where being overworked would accrue additional time. Am I mixing up terms?
Something we're trying to cut down on is 7 days a week, 14-hour days. We've attacked this from a cost point of view if we can't get leadership to understand the humanitarian need. We're now putting it in policy that working lengthy hours will accrue paid (admin) leave. So the supervisor ultimately hurts themselves authorizing so much overtime. They will have to settle the books, and lose that person for their minimum and accrued time.