National Union of Social Justice Quotes
Every citizen willing to work and capable of working shall receive a just and living annual wage which will enable him to maintain and educate his family according to the standards of American decency
The founder was Charles E. Coughlin, 1891-1979, a demagogic Catholic Priest who drafted the principles and invited others to join him. Hundreds of thousands did in this organization which began in idealism, and ended in scandal and hate mongering, so much so that Father Coughlin was ordered off the radio and out of politics by the Catholic Church. The National Union in 1936 had morphed into the Union Party which ran Presidential candidates in the 1936 election.
National Union of Social Justice, Organizing Principles, November 11, 1934
Sourced by: Eigen's Political and Historical Quotations
This appears to be the first political use of the phrase. It would take a century for legislation in some states to mandate a living wage. Roosevelt, as a reformer was incredibly ahead of his time.
The National Union for Social Justice (NUSJ) was a United States political movement formed in 1934 by Charles Coughlin, a Catholic priest and radio host. It heavily criticized communism, capitalism, and the administration of Franklin D. Roosevelt, while also advocating for the nationalization of utilities and banks. The organization dissolved in 1937 after the political party it sponsored, the Union Party, drew less than two percent of the popular vote in the 1936 United States presidential election.