Thorstein Veblen's The Theory of the Labor Class

The Theory of the Leisure Class: An Economic Study of Institutions (1899), by Thorstein Veblen, is an economic treatise and detailed social critique of conspicuous consumption, as a function of social-class consumerism, which proposes that the social strata and the division of labor of the feudal period continued into the modern era.
Thorstein Bunde Veblen (July 30, 1857 – August 3, 1929) was an American economist and sociologist, and a leader of the institutional economics movement. Besides his technical work he was a popular and witty critic of capitalism, as shown by his best known book The Theory of the Leisure Class (1899).
-Wikipedia.com