" What sense would it make to classify a man as handicapped because he is in a wheelchair today, if he is expected to be walking again in a month, and competing in track meets before the year is out? Yet Americans are given “class” labels on the basis of their transient location in the income stream. If most Americans do not stay in the same broad income bracket for even a decade, their repeatedly changing “class” makes class itself a nebulous concept. Yet the intelligentsia are habituated, if not addicted, to seeing the world in class terms, just as they constantly speak of the deliberate actions of a personified “society” when trying to explain the results of systemic interactions among millions of individuals. "

― Thomas Sowell , The Vision of the Anointed: Self-Congratulation as a Basis for Social Policy