There aren't many social programs in the U.S. that have had as much of a positive impact as Social Security retirement benefits. For most recipients, it's a well-earned benefit after years of paying Social Security payroll taxes.

The decline of pensions as a source of retirement income leaves newly minted retirees in a precarious position: They are potentially more dependent on Social Security to make ends meet.  New research from an employee benefit nonprofit seems to provide a stark illustration of that trend.

Seniors get a choice as to when to file for Social Security. You’re allowed to sign up at any point once you turn 62. And if you wait until full retirement age (FRA), you’ll get your complete monthly benefit without a reduction.