The principles that Locke spoke of need one more element to make them work effectively. Self-Responsibilty. In Locke's vision, people should be and are responsible for themselves in most things, and only come together for things that cannot be done alone, namely defense from other nation's and the few laws needed to make society run efficiently (murder, thieving, etc).

In Communism, it's principles are based an idealistic view of humanity. In communism, Marx's true vision (which there is not much said about in his writings), humanity has no greed, no reason to be jealous of anyone else, no reason to be selfish. It completely ignores the truth about humanity in that humanity as a whole are greedy and selfish and will not normally do something unless it directly benefits themselves, and that as whole, they are lazy. You have probably worked with the people who will do the bare minimum at any given thing. But there is no oversight for the people at the top.