I have no idea, since they can be more or less hands-on with their economy as they need. Maybe their industry would need an even more developed third world to make up for the lost consumption in the west, but now I'm just guessing

Edit: enter BRI

In the very long run, it probably ends with the west becoming "colonized" by more productive economies. Being the imperial core takes the heaviest toll on you, and Lenin noticed that over 100 years ago