David Rosen writing in Counterpunch makes a good point.
In the postwar era of the great recovery, the working-class became the middle-class and lost its progressive meaning. Three factors shaped this development. First, the consumer revolution and suburbia fostered the celebrated middle-class prosperity. Second the new social sciences turned social relations into hollow income categories and consumer hucksters promoted aspiration rooted in accumulation and conformity. And, third, the Cold War at home, signified by Sen. Joe McCarthy, HUCA and the execution of Ethel and Julius Rosenberg, imposed social order.