Longer lives, eroding Social Security benefits, and rising health care costs – these are just some of the reasons older workers need to save more in their 401(k)s. To encourage them, Congress in 2001 approved a “catch-up contribution” for workers over age 50. The size of this additional tax-deductible contribution started at $1,000 in 2002 and jumped to $4,000 by 2005 and $5,000 in 2006. (After 2006, it continued to increase, though only at the rate of inflation, and is currently $6,000.) But the catch-up contribution has not turned into a broad-based solution to Americans’ retirement woes that some proponents had claimed at its passage. According to researchers at the Center for Retirement Research (which supports this blog), it helps…