The reasons for the increase in the budgeted income of Shanghai 222 social insurance fund are as follows:

1. Economic growth: With the development of economy, the income of enterprises and individuals will also increase accordingly, which will drive the increase in the payment amount of social insurance fund.

2. demographic changes: with the deepening of population aging, the proportion of people paying social insurance will also increase accordingly, thus driving the income growth of social insurance funds.

3. Policy adjustment: The constant adjustment of the government's social insurance policy will increase the proportion of social insurance payment or increase the coverage of social insurance, thus driving the income growth of social insurance funds.