It would be a mistake to conclude that the ideologemes of a given period are more directly accessible to us in so-called popular literature or mass culture (where they have presumably been less subject to the transformations of the more specifically “literary” text); on the other hand, it is evident that a certain derivate literature is a potential storehouse of such materials, provided they are not too rapidly resolved into matters of “influence.”
I disagree here with saying that "literary" texts have more semiotic weight and structure than genre/popular texts. He is refuting the egalitarianism of art by assuming that one form of expression has more meaning than others.
