I think that you guys have words like marxism and commnunism connected with practical cases of when those ideas were hijacked by speculators and manipulators, who in capitalist society, would probably lead some sects or financial schemes to gain money (power).
But in general marxism and communism dont really advocate leader nor central planning. Communism is actually stateless society - pure libertarianism, but without private property. Problem is how to get to that stage of society and moral level, when person will just share everything and will work just for the good feeling that he is enriching society, while other in society are enriching him. That is were state came into. Ofcourse state will manage this middle phaze and that is where hijacking happens.
I think under certain conditions voluntaristic communist society could work. But whole planning would have to be managed by software and computers, that would daily create quotes based on ever updating info about society. Also decentralised system would fit it best. But we have to get to that phaze through capitalism...this system will create technology, that will create abundance, then futuristic communist society is quite possible.
Also new communism wont be about workers, but jobless people who will be majority, their work will be done by robots.
"Too many useful things will render too many people useless" Karl Marx