“Every productive worker is a wage labourer; but this does not mean that every wage labourer is a productive worker. In all cases where labour is bought in order to be consumed as use value, as a service - and not in order to replace the value of the variable capital as a living factor and to be incorporated into the capitalist production process - this labour is not productive labour, and the wage labourer is not a productive worker. His labour is then consumed on account of its use value, not as positing exchange value, it is consumed unproductively, not productively. The capitalist therefore does not confront labour as a capitalist, as the representative of capital. He exchanges his money for labour as income, not as capital.”