Here's a famous quote from Marx
Quote: In fact, the realm of freedom actually begins only where labour which is determined by necessity and mundane considerations ceases; thus in the very nature of things it lies beyond the sphere of actual material production. Just as the savage must wrestle with Nature to satisfy his wants, to maintain and reproduce life, so must civilised man, and he must do so in all social formations and under all possible modes of production. With his development this realm of physical necessity expands as a result of his wants; but, at the same time, the forces of production which satisfy these wants also increase. Freedom in this field can only consist in socialised man, the associated producers, rationally regulating their interchange with Nature, bringing it under their common control, instead of being ruled by it as by the blind forces of Nature; and achieving this with the least expenditure of energy and under conditions most favourable to, and worthy of, their human nature. But it nonetheless still remains a realm of necessity. Beyond it begins that development of human energy which is an end in itself, the true realm of freedom, which, however, can blossom forth only with this realm of necessity as its basis.
I often hear statements about how socialism is a nice idea but it just doesn't work. Why doesn't it work? Usually the answer has something to do with human nature. I am told that socialism doesn't work because humans need incentive to work. If money, goods and services are distributed according to need then no one will want to do any work because that is the way human nature works. This is an argument that the "realm of freedom" cannot be extended beyond the restrictions imposed by human nature.
This assumes that human nature is necessarily what they believe it to be and thus capitalism is determined necessarily as a better alternative to socialism; he realm of freedom can be extended no further.
Is this an accurate understanding of human nature? Can the realm of freedom be extended no further with respect to economic organization?