To be sure, she told Fortune, the demographic evidence facing the program is undeniably grim. The ratio of workers to beneficiaries has plummeted from 10 or more in the mid-20th century to merely two or three today. As a result, the timeline for the depletion of the program’s surplus trust funds has accelerated, shifting from 2035 to the end of 2032. After 2032, incoming payroll tax revenue, income from taxation of benefits, and interest on the trust funds will not cover 100% of promised benefits.
* 时间复杂度:O(n log n)(主要来自排序),空间复杂度:O(n)
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