This theorem of equivalence is the postulate which lies at the root of the classical theory of distribution, but it manifestly does not admit of proof—or of disproof either, for that matter; since neither the economic forces which go into the process nor the product which emerges are, in the economic respect, of such a tangible character as to admit of quantitative determination. They are in fact incommensurable magnitudes. To this last remark the answer may conceivably present itself that the equivalence in question is an equivalence in utility or in exchange value, and that the quantitative determination of the various items in terms of exchange value or of utility is, theoretically, not impossible; but when it is called to mind that the forces or factors which go to the production of a given product take their utility or exchange value from that of the product, it will easily be seen that the expedient will not serve. The equivalence between the aggregate factors of production in any given case and their product remains a dogmatic postulate whose validity cannot be demonstrated in any terms that will not reduce the whole proposition to an aimless fatuity, or to metaphysical grounds which have now been given up.
The point of view from which the early, and even the later classical, economists discussed economic life was that of "the society" taken as a collective whole and conceived as an organic unit. Economic theory sought out and formulated the laws of the normal life of the social organism, as it is conceived to work out in that natural course whereby the material welfare of society is attained. The details of economic life are construed, for purposes of general theory, in terms of their subservience to the aims imputed to the collective life process. Those features of detail which will bear construction as links in the process whereby the collective welfare is furthered, are magnified and brought into the foreground, while such features as will not bear this construction are treated as minor disturbances. Such a procedure is manifestly legitimate and expedient in a theoretical inquiry whose aim is to determine the laws of health of the social organism and the normal functions of this organism in a state of health. The social organism is, in this theory, handled as an individual endowed with a consistent life purpose and something of an intelligent apprehension of what means will serve the ends which it seeks. With these collective ends the interests of the individual members are conceived to be fundamentally at one; and, while men may not see that their own individual interests coincide with those of the social organism, yet, since men are members of the comprehensive organism of nature and consequently subject to beneficent natural law, the ulterior trend of unrestrained individual action is, on the whole, in the right direction.
The details of individual economic conduct and its consequences are of interest to such a general theory chiefly as they further or disturb the beneficent "natural" course. But if the aims and methods of individual conduct were of minor importance in such an economic theory, that is not the case as regards individual rights. The early political economy was not simply a formulation of the natural course of economic phenomena, but it embodied an insistence on what is called "natural liberty." Whether this insistence on natural liberty is to be traced to utilitarianism or to a less specific faith in natural rights, the outcome for the purpose in hand is substantially the same. To avoid going too far afield, it may serve the turn to say that the law of economic equivalence, or conservation of economic energy, was, in early economics, backed by this second corollary of the order of nature, the closely related postulate of natural rights. The classical doctrine of distribution rests on both of these, and it is consequently not only a doctrine of what must normally take place as regards the course of life of society at large, but it also formulates what ought of right to take place as regards the remuneration for work and the distribution of wealth among men.
Under the resulting natural-economic law of equivalence and equity, it is held that the several participants or factors in the economic process severally get the equivalent of the productive force which they expend. They severally get as much as they produce; and conversely, in the normal case they severally produce as much as they get. In the earlier formulations, as, for example, in the authoritative formulation of Adam Smith, there is no clear or consistent pronouncement as regards the terms in which this equivalence between production and remuneration runs. With the later, classical economists, who had the benefit of a developed utilitarian philosophy, it seems to be somewhat consistently conceived in terms of an ill-defined serviceability. With some later writers it is an equivalence of exchange values; but as this latter reduces itself to tautology, it need scarcely be taken seriously. When we are told in the later political economy that the several agents or factors in production normally earn what they get, it is perhaps fairly to be construed as a claim that the economic service rendered the community by any one of the agents in production equals the service received by the agent in return. In terms of serviceability, then, if not in terms of productive force,[2] the individual agent, or at least the class or group of agents to which the individual belongs, normally gets as much as he contributes and contributes as much as he gets. This applies to all those employments or occupations which are ordinarily carried on in any community, throughout the aggregate of men's dealings with the material means of life. All activity which touches industry comes in under this law of equivalence and equity.
Now, to a theorist whose aim is to find the laws governing the economic life of a social organism, and who for this purpose conceives the economic community as a unit, the features of economic life which are of particular consequence are those which show the correlation of efforts and the solidarity of interests. For this purpose, such activities and such interests as do not fit into the scheme of solidarity contemplated are of minor importance, and are rather to be explained away or construed into subservience to the scheme of solidarity than to be incorporated at their face value into the theoretical structure. Of this nature are what are here to be spoken of under the term "pecuniary employments," and the fortune which these pecuniary employments have met at the hands of classical economic theory is such as is outlined in the last sentence.
In a theory proceeding on the premise of economic solidarity, the important bearing of any activity that is taken up and accounted for, is its bearing upon the furtherance of the collective life process. Viewed from the standpoint of the collective interest, the economic process is rated primarily as a process for the provision of the aggregate material means of life. As a late representative of the classical school expresses it: "Production, in fact, embraces every economic operation except consumption."[3] It is this aggregate productivity, and the bearing of all details upon the aggregate productivity, that constantly occupies the attention of the classical economists. What partially diverts their attention from this central and ubiquitous interest, is their persistent lapse into natural-rights morality.
The result is that acquisition is treated as a sub-head under production, and effort directed to acquisition is construed in terms of production. The pecuniary activities of men, efforts directed to acquisition and operations incident to the acquisition or tenure of wealth, are treated as incidental to the distribution to each of his particular proportion in the production of goods. Pecuniary activities, in short, are handled as incidental features of the process of social production and consumption, as details incident to the method whereby the social interests are served, instead of being dealt with as the controlling factor about which the modern economic process turns.
Apart from the metaphysical tenets indicated above as influencing them, there are, of course, reasons of economic history for the procedure of the early economists in so relegating the pecuniary activities to the background of economic theory. In the days of Adam Smith, for instance, economic life still bore much of the character of what Professor Schmoller calls Stadtwirtschaft. This was the case to some extent in practice, but still more decidedly in tradition. To a greater extent than has since been the case, households produced goods for their own consumption, without the intervention of sale; and handicraftsmen still produced for consumption by their customers, without the intervention of a market. In a considerable measure, the conditions which the Austrian marginal-utility theory supposes, of a producing seller and a consuming buyer, actually prevailed. It may not be true that in Adam Smith's time the business operations, the bargain and sale of goods, were, in general, obviously subservient to their production and consumption, but it comes nearer being true at that time than at any time since then. And the tradition having once been put into form and authenticated by Adam Smith, that such was the place of pecuniary transactions in economic theory, this tradition has lasted on in the face of later and further changes. Under the shadow of this tradition the pecuniary employments are still dealt with as auxiliary to the process of production, and the gains from such employments are still explained as being due to a productive effect imputed to them.
According to ancient prescription, then, all normal, legitimate economic activities carried on in a well regulated community serve a materially useful end, and so far as they are lucrative they are so by virtue of and in proportion to a productive effect imputed to them. But in the situation as it exists at any time there are activities and classes of persons which are indispensable to the community, or which are at least unavoidably present in modern economic life, and which draw some income from the aggregate product, at the same time that these activities are not patently productive of goods and can not well be classed as industrial, in any but a highly sophisticated sense. Some of these activities, which are concerned with economic matters but are not patently of an industrial character, are integral features of modern economic life, and must therefore be classed as normal; for the existing situation, apart from a few minor discrepancies, is particularly normal in the apprehension of present-day economists. Now, the law of economic equivalence and equity says that those who normally receive in income must perforce serve some productive end; and, since the existing organization of society is conceived to be eminently normal, it becomes imperative to find some ground on which to impute industrial productivity to those classes and employments which do not at first view appear to be industrial at all. Hence there is commonly visible in the classical political economy, ancient and modern, a strong inclination to make the schedule of industrially productive employments very comprehensive; so that a good deal of ingenuity has been spent in economically justifying their presence by specifying the productive effect of such non-industrial factors as the courts, the army, the police, the clergy, the schoolmaster, the physician, the opera singer.
But these non-economic employments are not so much to the point in the present inquiry; the point being employments which are unmistakably economic, but not industrial in the naïve sense of the word industry, and which yield an income.