Keynes urged governments to aid a weak economy by stimulating demand by running deficits. When a government’s outgo — its spending — exceeds its income — primarily from taxes — on balance it puts funds into the economy. This encourages buying and investing. Deficits are stimulative, and thus Keynes considered them helpful in dealing with a weak economy. On the other hand, when economies are strong, Keynes said governments should run surpluses, spending less than they take in. This removes funds from the economy, discouraging spending and investment. Surpluses are contractionary and thus an
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