Sure, but if those $10k shipping costs get you labor at a quarter of the price, I don't think the financials ever become favorable for high-wage countries like

Sure, but if those $10k shipping costs get you labor at a quarter of the price, I don't think the financials ever become favorable for high-wage countries like the US (average salary in urban China is <$20k/year). Even in much more highly automated industries you have a shift towards lower wage regions (see eastern europe automotive industry as an example) because you still need labor to build and maintain the factories at the very least.