please answer this

(d) Suppose a government introduces a pay-as-you-go social security system where young indivi duals pay a lump-sum tax T and old individuals receive (1+ n)T. Suppose that if we set T = 0, the equilibrium allocation corresponds to the one computed in part (a), and furthermore, suppose th at the latter satisfies the restrictions of part (b). Is the introduction of a socially security system b eneficial for the society? Explain the intuition behind your answer. (10 marks)