"No part or fraction of the community is a productive factor in its own right and taken by itself, since no work can be done by any segment of the community in isolation from the rest; no one plant or works would be a producer in the absence of all the rest. The total product is the product of the total community's work; or rather it is the product of the work of that fraction of the people who are employed in productive work, which is not quite the same thing, since there is much work spent on the consumption of goods, and on ways and means for such consumption, as well as on their production. Indeed, it is by no means certain that there is not more time, strain and ingenuity spent on the consumption of goods than on their production. Apart from sports, menial service, fashionable dress and equipage, pet animals and mandatory social amenities, there would also have to be included under the ways and means of consumption virtually all that goes into salesmanship and advertising. Virtually all of these things have to do with the organized consumption of goods; and virtually all are therefore to be written off as waste motion, so far as regards their effect on the net productive efficiency of the industrial community, or of the industrial system whose tissues are consumed in enterprise of that kind. The amount which is to be written off as consumptive waste in this way is approximately the same as the net margin of product over cost; and according to the enlightened principles of self-help and equal opportunity, as these principles work out under the new order of industry, it is for the investors to take care of this consumptive waste and to see that no unconsumed residue is left over to cumber the market and produce a glut."