And I disagree with that. Why would the expectation be to work overtime? My expectation is not to work overtime. My expectation is to be paid for the time I work, and then go home and not work (and not get paid for that time). I think it's a reasonable expectation. If the result of such a law is that I earn less money, I'm allowed to accept that and settle for a lower salary in return for my personal time. Maybe many people think like you, and maybe many people think like me.
But such a law would give me a choice. Yes, I could decide to work overtime and make up for the lower salary (but at least get paid for my work), or I could decide not to. Currently it's either free overtime or no job.