It might otherwise appear paradoxical that money can be replaced by worthless paper; but that the slightest alloying of its metallic content deprecia… - Karl Marx

Our epoch, the epoch of the bourgeoisie, possesses, however, this distinct feature: it has simplified class antagonisms. Society as a whole is more and more splitting up into two great hostile camps, into two great classes directly facing each other — bourgeoisie and proletariat.

In capitalist society spare time is acquired for one class by converting the whole life-time of the masses into labour-time.

Money is the universal equivalent form of all commodities, which already show in their prices that they ideally represent a specific sum of money, expect to be transformed into money, and only receive the form in which they can be converted into use-values for their possessor by changing places with money.