Concept
Surplus labour (German: Mehrarbeit) is a concept used by Karl Marx in his critique of political economy. It means labour performed in excess of the labour necessary to produce the means of livelihood of the worker ("necessary labour"). The "surplus" in this context means the additional labour a worker has to do in their job, beyond earning their keep. According to Marxian economics, surplus labour is usually uncompensated (unpaid) labour. Marx explains the origin of surplus labour in the following terms: The historical emergence of surplus labour is, according to Marx, also closely associated with the growth of trade (the economic exchange of goods and services) and with the emergence of a society divided into social classes. As soon as a permanent surplus product can be produced, the moral-political question arises as to how it should be distributed, and for whose benefit surplus-labour should be performed. The strong defeat the weak, and it becomes possible for a social elite to gain control over the surplus-labour and surplus product of the working population; they can live off the labour of others. Labour which is sufficiently productive so that it can perform surplus labour is, in a cash economy, the material foundation for the appropriation of surplus-value from that labour. How exactly this appropriation will occur, is determined by the prevailing relations of production and the balance of power between social classes. According to Marx, capital had its origin in the commercial activity of buying in order to sell and rents of various types, with the aim of gaining an income (a surplus value) from this trade. But, initially, this does not involve any capitalist mode of production; rather, the merchant traders and rentiers are intermediaries between non-capitalist producers. During a lengthy historical process, the old ways of extracting surplus labour are gradually replaced by commercial forms of exploitation. In Das Kapital Vol.