The stupider, lazier, more apathetic, less creative, less responsible people are, the more desirable is Communism. If you put no work into improving, and you are left free and self-sufficient, you'll be bad at doing everything. Communism rewards this by calling you needy and giving you things. If you don't want to work to earn what you have, left free and self-sufficient you will have nothing. Again, you will be 'needy' and have things given to you. If you feel that the responsibility of protecting you ought not to fall to yourself but to another, left free and self-sufficient you will find yourself unprotected.
Communism is a system with a Gospel that must be put into place through violent revolution. Capitalism is a system that must evolve. Communism presumes an absolute truth in its creator's writings. Capitalism implicitly understands the value of improving piecemeal. Communism is a system of dictated sacrifice according to prescribed rules, whether imposed on one by an actual dictator or oneself. Capitalism is a system of constant criticism; of conjecture and refutation.
Inherent in the workings of Capitalism is the best epistemology known to man. Inherent in the workings of Communism is all the hallmarks of the organised religions it sought to repudiate and eradicate, and succeeded only in replacing: ritual, sacrifice, following of charismatic leaders, and adherence to gospel.