On salary (not hourly) this is a useless question.

Say they make 100k/yr. With 40hr weeks that's roughly $50/hr. With 60 hour weeks and 1.5x base pay, you could say it's $20/hr. It's all the same.

What you seem to be asking for is for companies to pay you the same, just say your base is lower so they can pay you 1.5x you base for appearances sake.

Now, optics aside, if you take an offer with an expectation of 40 hrs / week and they make you work 60, then sure. That's exploitation. But if the expectations are clear upfront, "base pay" is just legalese.