The end state vector of capitalism has been like this for decades now. What can change this:

- large scale geopolitical demographic collapse of China and/or world trade requiring massive industrial production investment, which would be ... sort of ... like post-WWII

- China does not collapse and a new bipolar cold war ensues requiring the US economy and state to keep the "underclass" motivated and cooperative: it probably isn't a coincidence that the fall of the Berlin Wall has preceded this rich-poor divide.