I.4,000c+1,000v+1,000s=6,000means of production
II.2,000c+500v+500s=3,000means of consumption

Here c stands for the material means of production that have been used, expressed in terms of social labour time; v stands for the social labour time necessary to maintain the workers themselves and s for that needed to maintain those who do not work and to build up the reserves.

If we check up on the proportions of this diagram, we obtain the following result: there is neither commodity production nor exchange, but in truth a social division of labour. The products of Department I are assigned to the workers of Department II in the requisite quantities, and the products of Department II are apportioned to everyone, worker or no, in both departments, and also to the reserve-fund; all this being the outcome not of an exchange of equivalents but of a social organisation that plans and directs the process as a whole—because existing demands must be satisfied and production knows no other end but to satisfy the demands of society.

Yet all that does not detract from the validity of the equations. The product of Department I must equal Ic + IIc: this means simply that Department I must annually renew all the means of production which society has used up during one year’s labour. The product of Department II must equal the sum of I(v + s) + II(v + s): this means that society must each year produce as many consumer goods as are required by all its members, whether they work or not, plus a quota for the reserve fund. The proportions of the diagram are as natural and as inevitable for a planned economy as they are for a capitalist economy based upon anarchy and the exchange of commodities. This proves the diagram to have objective social validity, even if, just because it concerns simple reproduction, it has hardly more than theoretical interest for either a capitalist or a planned economy, finding practical application only in the rarest of cases.

The same sort of scrutiny must now be turned on the diagram of enlarged reproduction. Taking Marx’s second example as the basis for our test, let us again imagine a socialist society. From the point of view of a regulated society we shall, of course, have to start with Department II, not with Department I. Assuming this society to grow rapidly, the result will be an increasing demand for provisions by its members, whether they work or not. This demand is growing so quickly that a constantly increasing quantity of labour—disregarding for the moment the progress of labour productivity—will be needed for the production of consumer goods. The quantities required, expressed in terms of social labour incorporated in them, increase from year to year in a progression of, say, 2,000 : 2,215 : 2,399 : 2,600 and so on. Let us further assume that technical conditions demand an increasing amount of means of production for producing this growing quantity of provisions, which, again measured in terms of social labour, mounts from year to year in the following progression: 7,000 : 7,583 : 8,215 : 8,900 and so on. To achieve this enlargement of production, we must further have a growth in the labour performed per annum according to the following progression: 2,570 : 2,798 : 3,030 : 3,284. [The figures correspond to the respective amounts of I(v + s) + II(v + s).] Finally, the labour performed annually must be so distributed that one-half is always used for maintaining the workers themselves, a quarter for maintaining those who do not work, and the last quarter for the purpose of enlarging production in the following year. Thus we obtain the proportions of Marx’s second diagram of enlarged reproduction for a socialist society. In fact, three conditions are indispensable if production is to be enlarged in any society, even in a planned economy: (1) the society must have an increasing quantity of labour power at its disposal; (2) in every working period, the immediate needs of society must not claim the whole of its working time, so that part of the time can be devoted to making provision for the future and its growing demands; (3) means of production must be turned out year after year in sufficiently growing quantities—without which production cannot be enlarged on a rising scale. In respect of all these general points, Marx’s diagram of enlarged reproduction has objective validity—mutatis mutandis—for a planned society.

It remains to test whether it is also valid for a capitalist economy. Here we must ask first of all: what is the starting point of accumulation? That is the approach on which we have to investigate the mutual dependence of the accumulative process in the two departments of production. There can be no doubt that under capitalist conditions Department II is dependent upon Department I in so far as its accumulation is determined by the additional means of production available. Conversely, the accumulation in Department I depends upon a corresponding quantity of additional consumer goods being available for its additional labour power. It does not follow, however, that so long as both these conditions are observed, accumulation in both departments is bound, as Marx’s diagram makes it appear, to go on automatically year after year. The conditions of accumulation we have enumerated are no more than those without which there can be no accumulation. There may even be a desire to accumulate in both departments, yet the desire to accumulate plus the technical prerequisites of accumulation is not enough in a capitalist economy of commodity production. A further condition is required to ensure that accumulation can in fact proceed and production expand: the effective demand for commodities must also increase. Where is this continually increasing demand to come from, which in Marx’s diagram forms the basis of reproduction on an ever rising scale?

It cannot possibly come from the capitalists of Departments I and II themselves—so much is certain right away—it cannot arise out of their personal consumption. On the contrary, it is the very essence of accumulation that the capitalists refrain from consuming a part of their surplus value which must be ever increasing—at least as far as absolute figures are concerned—that they use it instead to make goods for the use of other people. It is true that with accumulation the personal consumption of the capitalist class will grow and that there may even be an increase in the total value consumed; nevertheless it will still be no more than a part of the surplus value that is used for the capitalists’ consumption. That indeed is the foundation of accumulation: the capitalists’ abstention from consuming the whole of their surplus value. But what of the remaining surplus value, the part that is accumulated? For whom can it be destined? According to Marx’s diagram, Department I has the initiative: the process starts with the production of producer goods. And who requires these additional means of production? The diagram answers that Department II needs them in order to produce means of consumption in increased quantities. Well then, who requires these additional consumer goods? Department I, of course—replies the diagram—because it now employs a greater number of workers. We are plainly running in circles. From the capitalist point of view it is absurd to produce more consumer goods merely in order to maintain more workers, and to turn out more means of production merely to keep this surplus of workers occupied. Admittedly, as far as the individual capitalist is concerned, the worker is just as good a consumer, i.e. purchaser of his commodity, as another capitalist or anyone else, provided that he can pay. Every individual capitalist realises his surplus value in the price of his commodity, whether he sells it to the worker or to some other buyer. But this does not hold true from the point of view of the capitalist class as a whole. The working class in general receives from the capitalist class no more than an assignment to a determinate part of the social product, precisely to the extent of the variable capital. The workers buying consumer goods therefore merely refund to the capitalist class the amount of the wages they have received, their assignment to the extent of the variable capital. They cannot return a groat more than that; and if they are in a position to save in order to make themselves independent as small entrepreneurs, they may even return less, though this is the exception.

Part of the surplus value is consumed by the capitalist class itself in form of consumer goods, the money exchanged for these being retained in the capitalists’ pockets. But who can buy the products incorporating the other, the capitalised part of the surplus value? Partly the capitalists themselves—the diagram answers—who need new means of production for the purpose of expanding production, and partly the new workers who will be needed to work these new means of production. But that implies a previous capitalist incentive to enlarge production; if new workers are set to work with new means of production, there must have been a new demand for the products which are to be turned out.

Perhaps the answer is that the natural increase of the population creates this growing demand. In fact, the growth of the population and its needs provided the starting point for our examination of enlarged reproduction in an hypothetical socialist society. There the requirements of society could serve as an adequate basis, since the only purpose of production was the satisfaction of wants. In a capitalist society, however, the matter is rather different. What kind of people are we thinking of when we speak of an increase in the population? There are only two classes of the population according to Marx’s diagram, the capitalists and the workers. The natural increase of the former is already catered for by that part of the surplus value which is consumed inasmuch as it increases in absolute quantity. In any case, it cannot be the capitalists who consume the remainder, since capitalist consumption of the entire surplus value would mean a reversion to simple reproduction. That leaves the workers, their class also growing by natural increase. Yet a capitalist economy is not interested in this increase for its own sake, as a starting point of growing needs.

The production of consumer goods for Iv and IIv is not an end in itself, as it would be in a society where the economic system is shaped for the workers and the satisfaction of their wants. In a capitalist system, Department II does not produce means of consumption in large quantities simply to keep the workers of Departments I and II. Quite the contrary: a certain number of workers in Departments I and II can support themselves in every case because their labour power is useful under the obtaining conditions of supply and demand. This means that the starting point of capitalist production is not a given number of workers and their demands, but that these factors themselves are constantly fluctuating, ‘dependent variables’ of the capitalist expectations of profit. The question is therefore whether the natural increase of the working class also entails a growing effective demand over and above the variable capital. And that is quite impossible. The only source of money for the working class in our diagram is the variable capital which must therefore provide in advance for the natural increase of the workers. One way or the other: either the older generation must earn enough to keep their offspring—who cannot, then, count as additional consumers; or, failing that, the next generation, the young workers, must turn to work in order to obtain wages and means of subsistence for themselves—in which case the new working generation is already included in the number of workers employed. On this count, the process of accumulation in Marx’s diagram cannot be explained by the natural increase of the population.