他是第一个发现世界上有大批经济学家理论上存在缺陷的人。他说，只要价格具有吸引力，每一件好东西都可以买到。他还解释说，包括约翰·斯图亚特·穆勒（John Stuart Mill）在内的一些古典经济学家也明白，个人不能长期囤积钱，而且可以立即花掉。但是，由于经济危机造成的暂时的不确定性，这是由于通货膨胀不稳定造成的（Reisman，1998），所以花钱是最频繁的支出。
For a time period of over four decades from the time during mid-1930’s to the mid-1970, the economics from Keynesian almost led to the monopolization of the economic policy around the world. This new economics was something which can express the economic stability of the mankind, the complete employment and the prosperity of the material (Martin et al, 1995). Each of these different scenarios was governed by the fiscal policies of the mankind. These ideas were very strong and were accepted by everyone unless Henry Hazlitt refitted the ideas.
He was the very first person who observed flaws in the theories of a large number of economists in the world. He said that each and every good can be bought by the byers if and only if its prices are attractive. He had also explained that a number of classical economists including John Stuart Mill, also understood that the individuals can’t hoard money for a long time and they can spend it immediately. But, the money which is spend is the most frequent expenditure of the money, because of the temporary uncertainties which has been created due to the economic crises, which are either caused due to unstable inflation (Reisman, 1998).
Hazlitt considered that the inflationary fix which was proposed by Keynes was dangerous to the economy of the world. He pointed that there should not be a focus on the macroeconomic aggregation which conceals the microeconomic relationship with the magnitude of individual prices and the earnings. He suggested that a large number of aggregates are important in the market including the price level, the level of the wages, the overall output, the sum of the demand and the overall supply are some of the most important factors of the economy.