Well that certainly is a good point.
I would counter that by saying that where you have rich and poor, the west and other capitalist nations, there are poor. There are also rich people who used to be poor. People who changed their fate.
In countries where the government steps in to make equal citizens, there has yet to be one that makes everyone rich, and plenty where they make everyone poor.
In North Korea, Cuba, Vietnam, Red China, others and former Soviet Union (probably the best, but they still had to build walls to keep people in) the people were impoverished and there was virtually no upward mobility. The state chose who the elite were, and they were the only ones who lived well.
Some of those countries adopted more capitalistic policies and they created wealth for people. Yes, some people are still poor.
So fuck you.