A Preliminary Inquiry into the Theory of Service Value

Is the theory of service value a bourgeois economic viewpoint? Recently I came across a few questions that forced me to make an inquiry into the source of labor value in a capitalist society. Marx noted: "The value of labor is the value of means of subsistence needed to support the laborer," and involved in it are certain expenses for "education and training." What value of means of subsistence do these kinds of educational expenses manifest? Obviously, educational expenditures for the laborers comprise not only the cost of such necessities as desks, chairs, pens, and ink (the value of this portion comes from the labor by workers of the sector producing means of subsistence) but also the live labor of educators. The value of this portion is not materialized in any means of subsistence. Evidently, part of the labor value is not the value of means of subsistence. Instead of creation by productive labor, this part of value is created by service labor.