So the "mind worker" deserves to get paid for his labor, precisely because he did the mind work? Now who's the intellectual Marxist?
He ONLY deserves to get paid for his labor if someone actually USES the fruits of his labor. If the one who wants to use the fruits of his labor doesn't like the price, then he can simply refrain from consuming the labor of the mind worker. It's very simple. Basic capitalism, actually.
...but not everybody is going to follow this. So you send out the men with guns to do your bidding.