It's a complicated answer because of laws nerfing collective labor power in the US, like Taft-Hartley. That is, I believe there's a big thumb already lowering

It's a complicated answer because of laws nerfing collective labor power in the US, like Taft-Hartley. That is, I believe there's a big thumb already lowering wages to below its worth. So the real question is, how do we determine "worth"? Some countries with strong unions, like Denmark, have an equivalent of $20/hour minimum wage for McDonald's employees, even though Denmark has no minimum wage.