Suppose Americans do not have sufficient income to purchase Chinese made products after the scenario you say sets in, what happens next? Will we sit on our hands doing nothing? The profit motive will make the entrepreneurial types create products. Even if they have no capital, they will do it using labor. That is the nature of the free-market.
“”Suppose Americans do not have sufficient income to purchase Chinese made products after the scenario you say sets in, what happens next?”
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For starters, our military will collapse.
Just ours, mind you.