Of course there will always be sociopaths in management and it will never be perfect. But the law is better than nothing. The employer would be forced to make

Of course there will always be sociopaths in management and it will never be perfect. But the law is better than nothing. The employer would be forced to make the after hours policy explicit in the contract. If the employer violates the contract then they risk being sued. If there is any form of retribution (skipped promotion) then they could be sued. The bosses own boss would probably tell him to comply with the policy and stop fucking around. Not worth the risk. But there will always be some criminal managers who ignore the risk.