Its success lies in the fact that it's an insurance plan, not an investment plan or a welfare plan.

Its success lies in the fact that it's an insurance plan, not an investment plan or a welfare plan.

它的成功在于它是一个保险计划，而不是一个投资计划或福利计划。

-- James Franklin Roosevelt 詹姆斯·富兰克林·罗斯福