The economist responds that the more efficient you are at your work, the more time you will have for those other things. The trouble is that the more you start to think of your welfare in terms of money, the more likely you are to regard spending time with your friends or making love as an “opportunity cost” – the loss of money you would have made by working instead – rather than a benefit.
经济学家的反应是，你工作的效率越高，你就有越多的时间可用于其他事情。这一理论的麻烦在于，你越是用金钱来衡量你的福利，你就越可能认为你花在朋友和做爱上的时间是一种“机会成本”——你损失了原本可以用在工作上赚到的钱——而不是一项福利。