Reasons for the increase of federal social security expenditure since 1965

Since 1965, the reasons for the increase in federal social security expenditure are as follows:

1. Population aging: With the decline of fertility rate and the increase of longevity rate, the proportion of the elderly population is increasing, leading to more people retiring and receiving social security benefits.

2. Policy expansion: The federal government has increased many social security projects and welfare projects in the past decades, such as medical insurance, disability insurance and social relief, and increased the expenditure on social security.

3. Inflation: With the passage of time, prices have risen, and social security benefits have also increased accordingly.

4. Income inequality: Income inequality leads low-income people to get more social security benefits and increase social security expenditure.