suggest points to prove ...

Although I oppose your idea, but i will give u some suggestions:

Adults should not care their parents(elderly) => I don't agree*^* (no良心)

Prove:
They are useless and they are the burden of their children because a big sum of money is needed to support them.Elderly have many experience for life because they have overcomed so many dificulties in life, so they must be able to solve their difficulties in life.It requires too much time and efforts to support elderlyIt is better for the adults to serve in the society rather than helping the elderly as they can't contribute anymore.Elderly need too much care and it is too difficult for adult to care them because time is money in this society.