Where else is China et al going to sell all the stuff they can produce via their physical overinvestment that was driven by the “export led growth” mantra?
There is no untapped source of demand anywhere in the world. There isn’t the income. All they could do is produce less and cause their economies of scale to go into reverse.
So instead they sell stuff for accounting entries, which are then used on the asset side of their currency area balance sheet to justify issuing more of their own currency and maintain the circulation.
They could, of course, just buy the time currently used for producing excess exports and maintain the circulation in any case. But that would cause lots of people who are hard of accounting to get very upset.
So instead they continue with financial mercantilism, allowing everybody there to pretend that they are productively engaged, not metaphorically digging holes and filling them back in again.
And that would continue, thanks to those nations supplying the accounting entries and receiving all that nice output, but for somebody getting elected on the US side who actually believes the “lack of saving” line and decided to do something about it. To the loss of the US people.
Quite why he think that saying the US isn’t paying enough for Canadian lumber or Chinese cars is good for anybody is beyond me.
Another win for the Emperors New Clothes.