How SSI went negative, and no one knew

Last year, as a debate over the runaway national debt gathered steam in Washington, Social Security passed a treacherous milestone. It went “cash negative.”

For most of its 75-year history, the program had paid its own way through a dedicated stream of payroll taxes, even generating huge surpluses for the past two decades. But in 2010, under the strain of a recession that caused tax revenue to plummet, the cost of benefits outstripped tax collections for the first time since the early 1980s.