Friendship, Socialism, Marxism

An argument in favor of Socialism is: 1. The best social arrangement, regarding both the whole and each of its parts, is Friendship, as Aristotle conceives it; 2. Thus, the best Economic system is the one that best promotes Friendship; 3. Socialism is the Economic system that best promotes Friendship; 4. Therefore, Socialism is the best Economic system.  Now, it is unclear why a Marxist would object to this argument, and, yet, it entails none of the standard Marxist principles.  That absence tends to indicate that the strength of Marxism is its exposure of the flaws of Capitalism, though perhaps undercut by an insistence on expressing its diagnoses in neo-Hegelian terms, i. e. Dialectical Materialism.