This failure to distinguish individual's objectively observed economic value (the power to promote or publicize products, draw attention to causes, etc.) from the "intellectual" powers is probably an elitist bias. Clearly, there are some individuals, including non-humans such as a racehorse, which have economic value unique to their individual body and being that cannot be captured or defined as an "intellectual" asset nor as a set of "social" relationships (because horses do not socialize in the sense humans do). Where slavery exists or has existed, there is clearly a value put on living bodies separate from their instructional or social selves.