"Government expenditure refers to the government's expenditure to provide public services and maintain government agencies. Government expenditure usually includes infrastructure construction, social security, education, medical and health, culture and art, environmental protection, national defense and security, etc. The scale and composition have an important impact on the development of the country's economy and society, and the welfare of people's livelihood.

Government expenditure occupies an important position in the economy of modern countries. Government expenditure can promote economic development, improve national living standards and people's livelihood benefits. The government provides public services through public expenditure, such as infrastructure construction, education and medical care. These public services have an important role in social development and people's livelihood benefits. Government expenditure can also stimulate economic development by expanding fiscal expenditure. During the economic depression, the government can increase the total demand by increasing public expenditure, thereby promoting the recovery and development of the economy.

The scale and composition of government expenditures also affect the sustainability of national fiscal fiscal. The increase in government expenditure will lead to an intensification of the contradiction between fiscal revenue and expenditure, which may lead to an increase in fiscal deficit and debt. Therefore, when formulating fiscal policies, the relationship between government expenditure and fiscal sustainability needs to be balanced. The government needs to ensure the balance of fiscal revenue and expenditure through the increase of fiscal revenue and open source and other methods.

Government expenditures are also affected by various factors such as politics, society and culture. Politically, government expenditures may be influenced by government policies and political concepts. In terms of society and culture, the scale and composition of government expenditures may be affected by social needs and values.

In short, government expenditure is an important part of a country's economy, society and politics, and has an important impact on national development, people's livelihood welfare and fiscal sustainability. The government needs to balance the relationship between government expenditure and fiscal sustainability when formulating fiscal policy, and consider the impact of various factors to ensure the rationality and effectiveness of government expenditure. "