USSR - socialism, China - Socialism, Korea, Vietnam - all socialist governments. Would you want to live there? After nigh on 90 years of 'socialism', Russia revolted and reverted to capitalism.
If you were to take away the veneers of civilisation, there is a pecking order to any animal life (humans included), Those who want to/can get on will get on. Those who don't/can't won't.
There are many things that are inherant in our animal nature that go against the grains of a civilised and moral society. One would hope we would care for the vunerable - but in reality we don't, we have little concept of extended family anymore - we may not be living in caves and leaving our elderly and infirm to die out on the plains, we just let them starve to death and be abused in nursing homes under the pretext of 'social care'. Evocative comment? Of course.
Nature dictates we strive to do our best for the next generation. As pointed out, we are still a society that looks to the class system; replace that with a ranking order in the animal kingdom and it works very well. The strongest monkey in the troop gets to lead. It's not all male dominated - the cleverest female meercat also gets to lead.
Money doesnt indicate class, it never has. Money cannot buy class (or social heirarchy) you can only actually use your money to buy education and faux class traits for your children.