This is such an interesting insight that would never have occurred to me and seems to have a lot of explanatory power.
The global system of free trade and human rights has been the most free, prosperous, and peaceful era of humanity by far. Whole nations lifted from deep poverty, such as China and India (with still more to be done!). Incredible prosperity for the wealthy. Freedom, self-determination, democracy and human rights as the global norms.
Why are we throwing it away again? Much could be done to reform it, but we'll just throw it out?
Do you think Trump and the GOP are doing it because of labor rights?
And, while Mexico is trying to limit forced labor, they’re still one of our bigger exporters of forced labor: https://www.dol.gov/agencies/ilab/resources/reports/child-la...
So it’s hardly a hypothetical. As for balancing benefits and costs, slave labor intrinsically weakens the value of labor to any country that imports, so ideally the US would tariff goods that are labor intensive from countries that practice slave labor. In general, taking China off of the UN Human Rights Council would be a good show (for what little the UN does), and countries that oppose slavery should tariff the countries that do it as well. I don’t want a blood diamond on my wife‘s finger, why would I want a blood apple in my mouth?
As for Trump, I believe he does so in part, not from an ethics perspective however. I imagine he views slave labor as undercutting US labor value, just as illegal immigration does, and that it plays some part in wrestling manufacturing away from China.