Does the Debt Ceiling Mean Anything?

Does the debt ceiling even mean anything? It's like a credit limit on your credit card, but one which the borrower (the US government) gets to set for itself. Moreover, it's most likely that the government has been borrowing way above the ceiling but simply doesn't make it official until after the debt ceiling is raised: as it always is. Economists Antony Davies and James Harrigan discuss what this means for the taxpayer and for the economy.