The problem with both free-market and Keynesian economics is that they misunderstand the nature of modern investment. Both schools believe that investment is led by the private sector, either because taxes and regulations are low (in the free-market model) or because aggregate demand is high (in the Keynesian model).
自由市场和凯恩斯主义经济学的问题在于它们误解了现代投资的性质。两大学派都认为投资由私人部门领导，这是因为税收和监管较低（自由市场模型）或总需求较高（凯恩斯主义模型）。