2.--It is not necessary to give here the wage statistics for the groups of wage earners who are lowest in the industrial scale. They form the record of the fact that a considerable percentage of all female industrial wage earners, and some groups of male wage earners who perform unskilled work, are in receipt of wages insufficient to enable them to live according to those conceptions of the minimum level of satisfactory economic existence which have been formulated by public agencies from time to time.[113] 3.--The general idea of the living wage is not a new one. It has been the subject of many definitions. A comparison of a few of the best attempts to express the idea shows, on the one hand, the definite purpose which is its inspiration and, on the other hand, an inescapable element of indefiniteness which persists in all instances where the idea has been enacted into policy. The definition given to the living wage idea by the South Australian Industrial Court (an agency which has made searching efforts to explain its underlying assumptions) is that all wage earners should receive "a wage that will meet the reasonable and normal needs of the average citizen in a particular locality."[114] In the declaration of the war labor policy of the Dominion of Canada one can read that "all workers, including common laborers shall be entitled to a wage ample to enable them with thrift to maintain themselves and families in decency and comfort, and to make reasonable provision for old age."[115] And contained among those principles laid down for the guidance of the United States War Labor Board is the following, "In fixing wages, minimum rates of pay shall be established which will insure the subsistence of the worker and his family in health and comfort."[116]