But one of the federal government's biggest social welfare programs, which expanded when the economy convulsed, isn't shrinking back alongside the recovery."

The report continues, "Enrollment in the Supplemental Nutrition Assistance Program, as the modern-day food-stamp benefit is known, has soared 70% since 2008 to a record 47.8 million as of December 2012. Congressional budget analysts think participation will rise again this year and dip only slightly in coming years."

The biggest factor behind the upward march of food stamps is a sluggish job market and a rising poverty rate. At the same time, many states have pushed to get more people to apply for SNAP, a program where the federal government picks up the tab.

But there is another driver, which has its origins in President Bill Clinton's 1996 welfare overhaul. In recent years, the law has enabled states to ease asset and income tests for would-be participants, with the encouragement of the Obama administration, allowing into the program people with relatively higher incomes as well as savings.