The discussion about Marx and wants strikes at the heart of a basic problem of Marxism, I think. Marx clearly favored the expansion of production under capitalism because only this increased production could lead to the achievement of the fundamental good of communism, as noted by others, the over-all development of all individuals. Thus, with communism each person, not just an elite as with capitalism, would be able to develop, for example, musical talents. But this requires the mass production of musical instruments.
The problem an old one, namely, can this vision escape the basic problem of socialization, described perhaps best by Rousseau in his "Discourse on the Origins of Inequality", namely the problem of emulation, of defining oneself in terms of how other see you. Any social order based on "development" is subject to this problem, insofar as any individual might see herself as inferior since others are always more developed. Marx of course assumed a society of abundance, with a cooperative not individualistic ethos.
This issue is connected to the much broader problem of Marxism as a "progressive" or progress dominated ideology, in which humans are "masters" of nature and, it seems, masters of themselves in the sense of not being dominated by the kind of problem identified by Rousseau. I think that Marx was simply to to much a rationalist and that any developmentalist ideology is dissatisfying.
Jacob Segal