牛人Mankiw 和Weinzierl 2009年在NBER的工作论文、已经发表在2010年American Economic Journal: Economic Policy:“The optimal taxation of height: A case study of utilitarian income redistribution”。其中称“Moreover, a plausible parameterization using data on height and wages implies a substantial height tax: a tall person earning $50,000 should pay $4,500 more in tax than a short person."云云。怎么看这种结论、这种政策?