1938, the WPA employed 3.33 million people, and built streets, bridges and buildings across the country. Also created by the 1935 Act, the Rural Electrification Administration brought electrification of farms from 11% in 1934 to 50% by 1942, and nearly 100% by 1949. After war production brought full employment, the WPA was wound up in 1943. After World War II, the Employment Act of 1946 declared a policy of Congress to "promote full employment and production, increased real income... and reasonable price stability". However the Act did not follow the original proposal to say "all Americans... are entitled to an opportunity for useful, remunerative, regular, and full-time employment". By the 1970s, there was a growing opinion that the equal protection clause itself in the 14th Amendment should also mean that "every citizen who applies for a government job is entitled to it unless the government can establish some reason for denying the employment." The Humphrey-Hawkins Full Employment Act of 1978 was passed and enabled the President to create jobs to maintain full employment: it stated "the President shall, as may be authorized by law, establish reservoirs of public employment and private nonprofit employment projects". The Act sets the goal of federal government to ensure unemployment is below "3 per centum among individuals aged twenty and over" with inflation also under 3 per cent. It includes "policy priorities" of the "development of energy sources and supplies, transportation, and environmental improvement". These powers of a job guarantee, full employment, and environmental improvement have not yet been used. While the laws for a federal or state job guarantee have not yet been used, the Federal Reserve Act 1913 does require that the Board of Governors of the Federal Reserve System should use its powers "to promote effectively the goals of maximum employment, stable prices, and moderate long-term interest rates." During the Great Depression it was understood that inequality in the distribution of wealth had contributed to the lack of employment, and that Federal lending policy and bank regulation should pursue a range of objectives. However, the Federal Reserve became dominated by a theory of a natural rate of unemployment, taking the view that attempts to achieve full employment would accelerate inflation to an uncontrollably high. Instead it was said by theorists such as Milton Friedman that central banks should use monetary policy only to control inflation, according to the non-accelerating inflation rate of