Why would you not compare european communist countries woth european capitalist countries? Sure, africans and asians were poorer, but that goes without saying, honestly, what does that even have to do with this matter?
East Germany was poorer than west Germany. That tells us something. The fact that Ethiopia or whatever was poorer does not really tell us much about ehich economic system is better.
Well, it does not have an economy, so why would it have money?
Also, it doesn’t have politics and society in the conventional sense, but men are clearly subordinate to God. Christ is king, this is the way Christians think, so I am not sure this is a correct comparison.
The question of “should Christians strive for a classless society” is a complex one. Egalitarian ideals are very new compared to Christianity, but some Christians now think that in the “fallen world” authority is undesirable as it can be abused. This is not common though.
However, Marxism is an anti-religious ideology. Marxists both believe that religion will disappear after “the base” changes and it will become, ultimately, obsolete, and also have historically persecuted and enacted violence on Christians. So I am not surprised there are not many Marxist Christians.