Comment by pjc50

US unemployment rate floats along at about 4%, and is kept from going any lower to prevent inflation.

There are localized problems - and it's all very similar to the post-Thatcher UK - but you cannot be serious in imagining that employment would magically return to the exact spots it left. In fact that's one of the sub-problems OP talks about: so you want a US Shenzen. Where are you going to put it?

(UK equivalent: we're discussing keeping Scunthorpe blast furnaces open, so that we can have a "secure" supply of "domestic" steel .. made entirely from imported ingredients. Because the mines the plant was built to refine are empty)