The Problem with Socialism and Communism
Just as there is no science behind homeopathy, there is no economic science behind communism and socialism.
The economic theory of communism and socialism is not based on any mathematical logic, nor on any logic of human behavior, communism and socialism are not much different from an ancient religion, they are just beliefs.
The problem comes when you put a homeopath as the director of a hospital, or a communist/socialist in charge of the economy of a country.