The law of value is no longer simply a reflection of the relations of production; the monopoly capitalists — even while employing purely empirical methods — surround that law with a complicated scaffolding that turns it into a docile servant. The superstructure imposes a kind of art in which the artist must be educated. Rebels are subdued by the machine, and only exceptional talents may create their own work. The rest become shamefaced hirelings or are crushed.

Man and Socialism in Cuba (1965)