The Consumer Price Index is one of the most familiar measures in economics and politics. But some in Washington want to change the way the index is calculated to better reflect people's shopping habits.
While the proposed change is described as a technical fix, it could also cut the federal deficit by hundreds of billions of dollars over the next decade.
When it comes to reducing Medicare spending, asking wealthier seniors to pay more is one of the few areas where Democrats have shown a willingness to even consider the subject.
"I do believe there should be means testing. And those of us with higher income in retirement should pay more," said Sen. Dick Durbin, D-Ill., on last Sunday's Meet the Press. "That could be part of the solution."