SPDEMS could support this approach to save FDRs house-of-cards SS system. But the US ages would have to go to the mid-70s.
https://www.zerohedge.com/news/2018-06-19/russia-raises-retirement-age-above-life-expectancy-40-men
https://www.zerohedge.com/news/2018-06-19/russia-raises-retirement-age-above-life-expectancy-40-men