72 In determining the amount of the wage, the condition of a business and of the one carrying it on must also be taken into account; for it would be unjust to demand excessive wages which a business cannot stand without its ruin and consequent calamity to the workers. If, however, a business makes too little money, because of lack of energy or lack of initiative or because of indifference to technical and economic progress, that must not be regarded a just reason for reducing the compensation of the workers. But if the business in question is not making enough money to pay the workers an equitable wage because it is being crushed by unjust burdens or forced to sell its product at less than a just price, those who are thus the cause of the injury are guilty of grave wrong, for they deprive workers of their just wage and force them under the pinch of necessity to accept a wage less than fair.
Source: Quadragesimo Anno (Vatican.va)