Thoughts on superfluous disposable time

The whole development of wealth rests on the creation of disposable time. The relation of necessary labour time to the superfluous (such it is, initially, from the standpoint of necessary labour) changes with the different stages in the development of the productive forces. … In production resting on capital, the existence of necessary labour time is conditional on the creation of superfluous labour time. 398 Grundrisse

It is a law of capital, as we saw, to create surplus labour, disposable time; it can do this only by setting necessary labour in motion. - i.e. entering into exchange with the worker. It is its tendency, therefore, to create as much labour as possible; just as it is equally its tendency to reduce necessary labour to a minimum. It is therefore equally a tendency of capital to increase the labouring population, as well as constantly to posit a part of it as surplus population - population which is useless until such time as capital can utilize it. 399 Grundrisse

Labour capacity can perform its necessary labour only if its surplus labour has value for capital, if it can be realized by capital. Thus, if this realizability is blocked by one or another barrier, then (1) labour capacity itself appears outside the conditions of the reproduction of its existence; it exists without the conditions of its existence, and is therefore a mere encumbrance; needs without the means to satisfy them; (2) necessary labour appears as superfluous, because the superfluous is not necessary. It is necessary only to the extent that it is the condition for the realization of capital. Thus the relation of necessary and surplus labour, as it is posited by capital, turns into its opposite, so that a part of necessary labour - i.e. of the labour reproducing labour capacity - is superfluous, and this labour capacity itself is therefore used as a surplus of the necessary working population, i.e. of the portion of the working population whose necessary labour is not superfluous but necessary for capital. 609 Grundrisse

Capital… presses to reduce labour time to a minimum, while it posits labour time, on the other side, as sole measure and source of wealth. Hence it diminishes labour time in the necessary form so as to increase it in the superfluous form; hence posits the superfluous in growing measure as a condition – question of life or death – for the necessary. 706 Grundrisse

The industrial reserve army, during the periods of stagnation and average prosperity, weighs down the active army of workers; during the periods of over-production and feverish activity, it puts a curb on their pretensions. The relative surplus population is therefore the background against which the law of the demand and supply of labour does its work. 792 Capital

What capital adds is that it increases the surplus labour time of the mass by all the means of art and science, because its wealth consists directly in the appropriation of surplus labour time; since value directly its purpose, not use value. It is thus, despite itself, instrumental in creating the means of social disposable time, in order to reduce labour time for the whole society to a diminishing minimum, and thus to free everyone’s time for their own development. 708 Grundrisse