I get really scared when I hear anyone promise utopia. Literally every large-scale society that did turned into a hellscape after a while, and the idea itself never worked.
There was always someone who didn't buy into the idea, and they were blamed for why it didn't work. "If only those people were gone, then this would work and we'd be happy."
So millions die or are sent to the gulag or whatever it's called, and the idea is still not working.
China no longer promises its citizens a utopia. All they promise is a country that is powerful on the world stage. They're getting there, but it's still happening via exploitation. And the back alleys of Beijing still ring with abject poverty.
You're conveniently ignoring the cultural revolution, which causes an ideological purity spiral resulting in millions dead.
China only began to prosper when they relaxed their economic policies and began to allow property/business ownership and international trade (especially with the West) back in.
Also: the way they lifted all those people out of poverty was basically by freeing them to lift themselves out of poverty, by adopting an essentially capitalist system. You could say: they simply stopped holding people in poverty.
This wonderful world already exists in the US. Poor people have access to Medicaid / Emergency Rooms. The debate about food insecurity is whether or not poor people can afford fresh vegetables (because living on rice, cheap meats and canned peas/beans is not nutritious enough). About living in the street - if you are living on the street when you can get a job as a limo driver for $30 / hour just by walking in then maybe is your fault???
Wow, this is a joke isn't it?