So, what is the official definition of "working class"?
Roget's New Millennium™ ThesaurusMakes you wonder what the ignoble lowborn who wrote this entry for Roget was thinking, eh? Mind was fixed on pelf and place (see this, and this) perhaps.
Main Entry: plebeian
Part of Speech: adjective
Synonyms: banal, base, coarse, common, conventional, humble, ignoble, low, lowborn, lowly, mean, ordinary, pedestrian, popular, proletarian, traditional, uncultivated, unrefined, unsophisticated, unwashed*, vulgar, working-class
Antonyms: aristocratic, cultivated, refined
Source: Roget's New Millennium™ Thesaurus, First Edition (v 1.3.1)
* = informal or slang