The production and use of abundant supplies of high quality milk and dairy products are essential to the health and general welfare of the Nation: a dependable domestic source of supply of these foods in the form of high grade dairy herds and modern, sanitary dairy equipment is important to the national defense; and an economically sound dairy industry affects beneficially the economy of the country as a whole. It is the policy of Congress to assure a stabilized annual production of adequate supplies of milk and dairy products; to promote the increased use of these essential foods; to improve the domestic source of supply of milk and butterfat by encouraging dairy farmers to develop efficient production units consisting of high-grade, disease-free cattle and modern sanitary equipment; and to stabilize the economy of dairy farmers at a level which will provide a fair return for their labor and investment when compared with the cost of things that farmers buy.