Yahoo! News - Greenspan: Go slowly, but fix Social Security

Yahoo! News - Greenspan: Go slowly, but fix Social Security: "Greenspan said Congress could improve Social Security's finances by reducing benefits or raising the retirement age. But in the end, he said, that would not solve the demographic problem of lower birth rates and higher life expectancy, which means too few workers paying taxes for each retiree.
'The one certainty is that the resolution of the nation's unprecedented demographic challenge will require hard choices and that the future performance "