However, that comparison omits other relevant factors: leisure time, life expectancy, and economic inequality.

然而，这种比较忽略了其他相关因素：闲暇时间、预期寿命和经济不平等。

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In a series of articles and studies, he has argued that increasing life expectancy makes the midlife years a time to grow and flourish.

在一系列的文章和研究结果中，他认为不断增长的生活期望使得中年时期成长并日益蓬勃。

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And one other thought: this could be the first generation of children, in a very long time, that has a life expectancy shorter than that of their parents.

另一个想法是：在很长的时间内，这可能是期望寿命比其父母还要短的第一代儿童。

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Yet with the passage of time, life expectancy grew, the health of 60-year olds improved and the system evolved into one that literally subsidized retirement.

FORBES: Why Does The Federal Government Subsidize Retirement?