The corporation that is a monopoly will have the same right as the competitive concern to retain for its owners those surplus profits which are due to exceptional efficiency on the part of the managers of the business. That part of the surplus which is derived from the extortion of higher than competitive prices cannot be justly retained, since it rests upon no definite moral title. As we saw in the chapter on monopoly, the owners have no right to anything more than the prevailing rate of interest, together with a fair return for their labour and for any unusual efficiency that they may exercise. Should the surplus in question be discontinued by lowering prices, or should it be continued and distributed among the labourers? As a rule, the former course would seem morally preferable. While the labourers, as we shall see presently, are justified in contending for more than the "equitable minimum" at the expense of the consumer, their right to do so through the exercise of monopoly power is extremely doubtful. Whether this power is exerted by themselves or by the employer on their behalf, it remains a weapon which human nature seems incapable of using justly. _Wages Versus Interest_ Turning now to the claims of the labourers as against the capitalists, or interest receivers, we perceive that the right to any interest at all is morally inferior to the right of all the workers to the "equitable minimum." As heretofore pointed out more than once, the former right is only presumptive and hypothetical, and interest is ordinarily utilised to meet less important needs than those supplied by wages. Through his labour power the interest receiver can supply all those fundamental needs which are satisfied by wages in the case of the labourer. Therefore, it seems clear that the capitalist has no right to interest until all labourers have received the "equitable minimum." It must be borne in mind, however, that any claim of the labourer against interest falls upon the owners of the productive capital in a business, upon the undertaker-capitalist, not upon the loan-capitalist.