It is declared that the national defense involves large increases in the military forces and personnel in this state, a great increase in the number of workers in established industries and activities and the bringing of a large number of workers and their families to new defense industries and activities in this state; that there exists or impends an acute shortage of safe and sanitary dwellings available to such persons and their families in this state, which condition impedes national defense; that it is imperative that action be taken immediately to assure the availability of safe and sanitary dwellings for such persons to enable the rapid expansion of national defense activities in this state and to avoid a large labor turnover in defense industries, which would seriously hamper their production; that the provisions hereinafter enacted are necessary to assure the availability of safe and sanitary dwellings for persons engaged in national defense activities; and that such provisions are for the public use and the purpose of facilitating national defense in this state.