What, because we have this alternate system where the underbelly of society is happy, hale and having a really good time? The global south have been doing great under capitalism, the reason they are poor is they don't have a history of industrial success. The Chinese in particular are where they are right now because they embraced capitalism rather than throwing more bodies into the maw of communism and I think most of the world would prefer to follow their lead. Getting wealthier at that rate looks like a lot of fun.
Impoverished underbellys are in every system, they have nothing to do with capitalism. The problem is we treat low status people like garbage. Capitalism is just not a cause or consequence of human status hierarchies. But the lot of low status people is probably only going to improve with more AI because they of all people will benefit from cheap access to a system that makes high-intelligence decisions with more knowledge than can fit in a human mind.