Slavery, Dependence, Dialectic

In the section of the Phenomenology commonly characterized as the "Master-Slave Dialectic", Hegel conceives Slavery as essentially Dependence.  However, his attempt to classify it as a moment in a Dialectically determined Spiritual development gets complicated, because the transition to the next stage, i. e. the self-liberation from the Master of the Slave, necessarily involves Matter, upon which the Slave works.  With that concrete detail incorporated, the representation of the transition that emerges less abstractly resembles that of an employee's becoming self-employed.  But, implicit in that portrayal is that of the Master as a benefactor of someone who is weaker because dependent.  It is thus easy to conceive Marx as judging the suppression, by that portrayal, of the force entailed in Slavery as Bourgeois apologism, therby inspiring a Materialist alternative, updated with a class of Slaves, i. e. the Proletariat, and with an industrial Means of Production mediating the relation between the two parties.  So, with that genealogy, the relevance of Dialectic Materialism, even if flawed, to the exposition of Socialism, seems less contrived than if Marx is interpreted as adopting it for some less specific reason.