Fair enough but he didn't come up with individualist anarchy and so I don't think its fair to compare him to Marx, Spooner is probably a better comparison.
In order to believe in socialism at all you have to believe in marxist theory, you have to be focusing on the worker/capitalist relationship so that is why people relate any socialist theory to marx, I think this is a narrow view of the worker/boss relationship. The worker does have some advantages over the "boss" and it is a contractual agreement which is mutually beneficial. One such advatange is that the worker is willing to work for less money so he has more options. The capitalist is far better off hiring the lowely worker to for example manage a start up business for less money, why would he hire someone who he has to pay more? After all he is making his money from investments and this is an investment, the worker is thrilled at the opportunity.
As an example if I can farm 5 tons of corn with my own equipment, but then a capitalist offers me equipment that will enable me to farm 30 tons of corn if I give him 15. The socialist farmers daugher says "Why are we giving him 15 tons of corn daddy when we can make so much more money?" . The farmer explains to his daughter "Well you see without the use of his equipment we only get 5 tons of corn, so you see we are making an extra 10 tons of corn by giving him 15".
*if the workers labor was so valuable that the capitalist was ripping him off and he could do better than why would he work for the capitalist?
So then the question becomes:
"Well that is wage slavery, how can the farmer ever get ahead when the capitalist just keeps adding more and more farmers?"
The answer is your supposed to be able to save money.....Your supposed to be able to become an investor yourself. So the problem then becomes "why can't people save money?"
So this is why I think marx and socialist in general have a narrow view.