It's a relationship like this: All wealthy countries are capitalist. Some capitalist countries are wealthy.
Also, I would not consider China poor today, and certainly even less so in the future.
Singapore is ranked 3rd in the world by PPP, at $100k The United States is ranked 10th with at $62k
I can come with with hundreds of criteria by which US is laughable, take foreign debt for example, or number of people dying from preventable diseases.
This is not as hot of a take as you think. Many reactionaries believe that a monarchy under a good monarch is the ideal government system - much better than a democracy where uninformed voters make so many decisions