From the viewpoint of justice, however, this rule or standard is utterly inadequate. It is susceptible of two interpretations. "Wages prevailing elsewhere," may mean either the highest rates or those most frequently occurring. According to the latter understanding, only those wages which were below the majority rates should be raised, while all those above that level ought to be lowered. In almost all cases this would mean a reduction of the highest wages, as these are usually paid only to a minority of the workers of any grade. The adoption of the highest existing rates as a standard would involve no positive losses, but it would set a rigid limit to all possible gains in the future. According to either interpretation of the prevailing rate, the increases in wages which a powerful labour union seeks to obtain are unjust until they have been established as the prevailing rates. Thus, the attorney for the street railways of Chicago dissented from the increases in wages awarded to the employés by the majority of the board of arbitration in the summer of 1915 because, "these men are already paid not only a fair wage but a liberal wage, when the wages in the same employment and the living conditions in other large cities are taken into consideration, or when comparison is made of these men's annual earnings with the earnings in any comparable line of work in the city of Chicago."[214] In other words, the dominant thing is always the right thing. Justice is determined by the preponderance of economic force. Now, a rule such as this, which condemns improvement until improvement has somehow become general, which puts a premium upon physical and intellectual strength, and which disregards entirely the moral claims of human needs, efforts, and sacrifices, is obviously not an adequate measure of either reason or justice. And we may well doubt that it would be formally accepted as such by any competent and disinterested student of industrial relations. II. EXCHANGE-EQUIVALENCE THEORIES