Mises makes a great point on the role John Keynes’ works played with respect to justifying state power. Rothbard (and Hoppe) later extrapolated on this theme, and I think it is important to remember. In sum, “academics” like Keynes merely offer to the politicians exactly what they wanted to hear: that the accumulation of increased state power and subsequent interventionism into the economy is, conveniently, good for society. Politicians love power and bureaucrats think they can design a social plan to bring forth the Grand Vision. Thus, the thoughts of Keynes gave them everything they wanted on a silver platter: justification for their actions.
There are people who believe that the two books of Keynes that became best sellers The Economic Consequences of the Peace (1920), and The General Theory of Employment, Interest and Money (1936) decisively influenced the course of British policies and of world affairs. It is said that the first of these books inaugurated the anti-French and pro-German tendencies of Great Britain’s “appeasement” policy which virtually encouraged the rise of Nazism, permitted Hitler to defy the essential clauses of the Treaty of Versailles and finally resulted in the outbreak of the Second World War. It is furthermore asserted that the second book generated the “Keynesian revolution” of economic policies. The abandonment of the gold standard and the adoption of outright inflationary or “expansionist” fiscal methods, the New Deal and the Fair Deal, the full-employment policy, the intensification of anti-importation measures and many other kindred ventures are ascribed to the “unorthodox” ideas propagated by Keynes. If these assertions are correct, Keynes appears as the most influential personality of our age, whether the effects of these policies are to be considered as beneficial or disastrous.
It is often simply thought that the governments of the west were unsure of what actions they wanted to employ, whether laissez faire or a state-controlled economy. And Keynes humbly came to the scene with scholarly and scientific solutions for the world.
In actuality, Mises explains:
Keynes was definitely not the inaugurator of a new economic policy. The governments did not have to wait for his advice in order to learn that inflation is a handy means to fill the empty vaults of the treasury. The Keynesian policies were practiced by governments and powerful political parties long before they were advocated by Keynes. Keynes’ writings were enthusiastically received by people who found in them an apparently scientific justification for what they had already done for a long time in defying the teachings of economics.
They hated the theory according to which there was but one means toward the general improvement of people’s material well-being, viz., to increase the per head quota of capital invested. They longed for short cuts to an earthly paradise; a protective tariff, a cheap money policy, the closed shop, doles, and social security. They did not want to be told by the economists that it is the policy of the unions that creates unemployment as a lasting mass phenomenon and that the periodical recurrence of crises is the inevitable outcome of the easy money policy. They knew better; all evils were caused by capitalism.
To such people the Keynesian slogans appealed strongly. Here they found what they were looking for. If demand lags, create “effective” demand by expanding credit! If there is unemployment, print more money! If you want to increase “the real national dividend of useful goods and service,” then “dig holes in the ground paid for out of savings!” And, first of all, do not save, spend!
The triumph of Lord Keynes’ last book, the General Theory, was instantaneous. Although reasonable economists refuted his doctrines, it has become the gospel of the self-styled Progressives all over the world. Today many universities simply teach Keynesianism. It is really paradoxical. Nobody can any longer fail to realize that what is needed most is more saving and capital accumulation and that the inflationary and expansionist policies are on the verge of complete breakdown. But the students are still taught the dangers of saving and the blessings of expansionism.