Perhaps the single most important one of these followers was the Romanian born economist Abba P Lerner. Keynes's book The General Theory of Employment, Interest, and Money popularized the notion that market economies were prone to persistent unemployment. Keynes often receives credit for promoting government deficit spending as a means of combating unemployment. However, Abba Lerner developed this part of the Keynesian program.
Keynes did suggest the socialization of some investment by elected officials. This would solve the problem of unemployment within the framework of a democratic society. Yet Keynes did not work out the details of how this would work. Lerner (1943) proposed a program of "functional finance" to counteract the business cycle.