After considering the many problems of retirement finance in a lower-return world, the article (“The New Retirement Strategy,” Jan. 5), gets to David Blanchett’s suggestion: “It might be better to simply work longer.”

Yup. The best way to finance retirement is not to retire, at least not too soon. Shorten the time to be financed. Lengthen the time when savings can be generated. The math is simple and inescapable.