First, describe what is China's social security system, its establishment, previous reforms and current situation. How it works.
Then write why this system should be established. Significance to the social country, social stability and harmony. Efficiency and fairness. Income redistribution and so on.
Then write the motivation and resistance of this system. The motivation is the participation of the state, the support of the people, the trend of the times, Pareto optimality and so on. There are many obstacles, such as insufficient funds, insufficient liquidity, misappropriation of social security funds and lack of management talents.
Finally, put forward opinions and suggestions. We can adopt foreign experience and start with NGOs. For example, to promote the management of social security funds, we can cite the case of Chen Liangyu, and also put forward our own views on the current activity of social security funds in the stock market.
I suggest reading Buchanan's Capital, Freedom and the State and books by Hayek, Rawls and Pigou.
Writing endowment insurance can also refer to this model. At that time, I discussed how to avoid the interest rate risk in life insurance through Slatzky decomposition.