示范答案：
I suppose that the most obvious demerit must be the fact that it is detrimental to the stability of society. For the reason that some people may envy the rich in a very negative and extreme way. Therefore, it’s possible that they would some anti-social behavior, thus influence the safety and stability of society. As a result, it's indispensable for government to take measures to shorten the gap between the rich and poor, for instance, providing job opportunities or pension for the poor, collecting income tax on people with high salary, and other effective measures. Otherwise, the huge gap between the rich and poor must affect the society in a negative way.
