71 In the first place, the worker must be paid a wage sufficient to support him and his family. That the rest of the family should also contribute to the common support, according to the capacity of each, is certainly right, as can be observed especially in the families of farmers, but also in the families of many craftsmen and small shopkeepers. But to abuse the years of childhood and the limited strength of women is grossly wrong. Mothers, concentrating on household duties, should work primarily in the home or in its immediate vicinity. It is an intolerable abuse, and to be abolished at all cost, for mothers on account of the father's low wage to be forced to engage in gainful occupations outside the home to the neglect of their proper cares and duties, especially the training of children. Every effort must therefore be made that fathers of families receive a wage large enough to meet ordinary family needs adequately. But if this cannot always be done under existing circumstances, social justice demands that changes be introduced as soon as possible whereby such a wage will be assured to every adult workingman. It will not be out of place here to render merited praise to all, who with a wise and useful purpose, have tried and tested various ways of adjusting the pay for work to family burdens in such a way that, as these increase, the former may be raised and indeed, if the contingency arises, there may be enough to meet extraordinary needs.
Source: Quadragesimo Anno (Vatican.va)