You can’t have “free” trade with a country who pays $10 a week for labor. We can never compete. Thems the facts, as they say...
You can let them have certain cheap or low profit things we let them export it to you free, but you will LOSE every time on “free” trade for critical industries because we can never compete with $10 a week or even $10 a day labor...
The "libertarian response" is that cheap foreign labor ...
1. Uplifts foreign workers (a good thing).
2. Provides American consumers with cheap goods (a good thing).
3. Shifts American workers into more productive, higher-paying jobs (i.e., learn to code).
Thus, from a global utilitarian perspective, it provides for an optimum allocation of resources, both of capital and labor. Everyone benefits.
Well, that's the "libertarian response."