Yeah I worked in a grocery store making minimum wage about ten years ago. They paid employees as little as they could without breaking the law. During the pre-hire training session they were transparent that they were legally required to pay us for it. It wasn’t even normal work duties, just going through an online test.
The right of the US to establish and enforce any law is implicitly dependent on a fundamental right of people to reject the authority of a tyrannical government. Otherwise the legitimacy of the US as a sovereign nation is invalidated.