It is, of course, impracticable to foot up and compare gain and loss in such a case, where the losses, being of the nature of inhibited growth, cannot be ascertained. But since the industrial serviceability of the captain of industry is, on the whole, of a problematical complexion, it should be advisable for a cautious economic theory not to rest its discussion of him on his serviceability.[8] It appears, then, as all economists are no doubt aware, that there is in modern society a considerable range of activities, which are not only normally present, but which constitute the vital core of our economic system; which are not directly concerned with production, but which are nevertheless lucrative. Indeed, the group comprises most of the highly remunerative employments in modern economic life. The gains from these employments must plainly be accounted for on other grounds than their productivity, since they need have no productivity. But it is not only as regards the pecuniary employments that productivity and remuneration are constitutionally out of touch. It seems plain, from what has already been said, that the like is true for the remuneration gained in the industrial employments. Most wages, particularly those paid in the industrial employments proper, as contrasted with those paid for domestic or personal service, are paid on account of pecuniary serviceability to the employer, not on grounds of material serviceability to mankind at large. The product is valued, sought and paid for on account of and in some proportion to its vendibility, not for more recondite reasons of ulterior human welfare at large. It results that there is no warrant, in general theory, for claiming that the work of highly paid persons (more particularly that of highly paid business men) is of greater substantial use to the community than that of the less highly paid. At the same time, the reverse could, of course, also not be claimed. Wages, resting on a pecuniary basis, afford no consistent indication of the relative productivity of the recipients, except in comparisons between persons or classes whose products are identical except in amount,--that is to say, where a resort to wages as an index of productivity would be of no use anyway.[9] * * * * *