"Social Security's 75-year shortfall is 1 percent of GDP. Critics who like to cite scary dollar figures -- like an 'unfunded liability' of $10.7 trillion over 75 years -- almost never bother to mention the economy's size, which is crucial to the program's affordability. GDP over the next 75 years will total nearly $1,200 trillion, and the shortfall is just 1 percent of that. In short, Social Security faces a funding gap that's well-documented but manageable."