Spend-then-tax politicians

Federal income tax is too inefficient to raise the kind of money we need to pay our debts.

With budget deficits soaring and President Obama pushing a trillion-dollar-plus expansion of health coverage, some Washington policymakers are taking a fresh look at a money-making idea long considered politically taboo: a national sales tax.

Common around the world, including in Europe, such a tax -- called a value-added tax, or VAT -- has not been seriously considered in the United States. But advocates say few other options can generate the kind of money the nation will need to avert fiscal calamity.