The debt ceiling limit is back in the news. In the past, political leaders have responded to concerns about this issue by suggesting that Social Security checks might not go out on time should Congress not agree on another debt ceiling extension. This begs the obvious question: Why a program with a $2.8 trillion reserve cannot pay benefits on time? Pundits have weighed in on the subject, as have the fact checkers who largely agree that checks should not be at risk -- at least in theory. It is time for the Treasury Department to explain why Social Security checks...