In reality, guiding individual consumption is difficult, the reason is that we the cash preference, and the economy is bad, the more people are not willing to consumption. Therefore, Keynes put forward by the state to increase consumption. For a country to maintain normal operation, need a lot of expenditure, which is the so-called fiscal expenditure. The state financial expenditure is a kind of collective consumption, this is a very large number, enough to produce quality effects on the market. Therefore, Keynes found another role of state expenditure: it is not only to maintain the normal operation of the country, but also can be used as a tool of economic adjustment.When people are not willing to consumption or consumption is insufficient, can through the national fiscal spending to make up for, then drives the personal consumption.
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