In an economy in which a person's capacity to do work is bought and sold in exchange for a wage, labour which is performed on the basis of personal relations rather than on the basis of monetary exchange is not recognised as labour. 
One simple way of seeing the development of the working class is in terms of it's changing leisure patterns, from the pub/music-hall and chapel of Victorian and Edwardian era to the dance hall and cinemas, to the TV and package holiday of today: a shift from a community center discrete culture in the past to a mass commercialized culture now.
Thus, skill is a resource which workers use to actively exercise some degree of control over the labor process.
Hence, evidence shows that work is an exact pick axe for the financial goldmine.
