Thrift is a traditional virtue. Keynes, an economist, put forward the paradox of thrift, arguing that thrift is a virtue for individuals and families, but it is meaningful for society.

(1) Moderate consumption adapted to the economic level plays an important role in economic and social development, which is embodied in the following aspects: ① promoting economic development and increasing employment. ② Promote the improvement of people's living standards and quality of life.

(2) There are many answers, listed as follows:

Example 1: Vigorously develop production and increase residents' income-the improvement of income level is the prerequisite for the improvement of consumption level. Moreover, the improvement of consumption level is ultimately determined by the level of production development. Therefore, vigorously developing production and increasing per capita disposable income are conducive to expanding domestic demand.

Ex. 2: The government's financial subsidies to low-income people can increase their income and increase their consumption demand.

Answer Example 3: Perfect social security system-A perfect social security system can relieve consumers' worries to a certain extent, so that part of their savings originally used to resist risks such as diseases and unemployment can be converted into consumption and expand consumer demand.

Answer Example 4: Improve the legal environment and standardize the market order-a good market economic order and legal environment can reassure consumers, thus releasing more consumer demand.