Pure comunism sounds nice at first glance, but it also has major issues. Under comunism every one is equal, however inherently people are not equal and should be rewarded accordingly. What this leads to is that high performers are rewarded as much as lazy bums. This causes stagnation in production output as why try hard when you can chill. And as history tells us with Soviet Union, can lead to massive famines. It also creates parallel economies of bribes and favours because well connected and productive people still want to be above every one else, this gives unfair advantage mafias and criminals. As they have no moral problem abusing these parallel economies.

In my opinion, no pure system is good if it’s comunusim or capitalism. You have to have a bit of everything like in Scandinavian countries or some Western european countries. You need to reward high performers but not too much. You need to take care of the weak and sick but do not make it that it’s not worth working. You have to allow equal access to education no matter your background so everyone has the same starting point.