The trouble is that you can measure quantity of stuff, but not quality of life. How one combines quantity and quality in some index of “life satisfaction” is a matter of morals rather than economics, so it is not surprising that most economists stick to their quantitative measures of “welfare.”
更新的计量方法试图引入更广范围的“生活质量”指标。麻烦在于，你可以统计员工数量，但难以计算生活质量。你如何加总“生活满意度”之类的指标的数量和质量，这是一个道德问题，而不是经济问题，因此，毫不奇怪，大部分经济学家仍然坚持使用“福利”的量化指标。