A condition of China's WTO deal in 2001 was that in not employ capital controls with trade partnets:
> Commitment No 9: Non-tariff measures
> "China shall eliminate and cease to enforce trade and foreign exchange balancing requirements, local content and export or performance requirements made effective through laws, regulations or other measures."
Thus, there's been no 'test case' to date of the results of forcing manufacturers to pay real costs for outsourcing domestic USA manufacturing to sweatshop low-rate labor zones overseas.
This is probably the most pushed aspect (and least reported on by the media) of all the 'foreign trade deals' the US government has pushed from the 1980s onwards - relaxation of capital controls by the target country. Notably, countries that agreed to wholesale removal of all restrictions typically get gutted by pump and dump schemes, currency manipulation, and so on (see Asian crisis 1997 etc., which China avoided) run out of Wall Street and London financial centers.
Incidentally, from an economic perspective, Ricardo's Theory of Competitive Advantage (sheeps wool from Britain, grapes from France being the traditional example) which shows how two trade partners can mutually benefit. The concept only applies if profits from trade stay in the countries of origin; Britain setting up a slave plantation in France in 1750, for example, and exporting profits and wine to Britain would not be what Ricardo had in mind.