Initially, the open-ended style of American care will barely be touched, if only for political self-preservation. Health planners will adjust at the margins, as with virtual colonoscopy. But scarcity forces choices. As the Medicare trustees note in their report, the tax increases necessary to fund merely the current benefit schedule for the elderly would cripple the economy. The far more expensive public option will not turn into a pumpkin when cost savings do not materialize. At that point, government will clamp down with price controls in the form of lines and rock-bottom reimbursement rates.

Mr. Orszag says that a federal health board will make these Solomonic decisions, which is only true until the lobbies get to Congress and the White House. With virtual colonoscopy, radiologists and gastroenterologists are feuding over which group should get paid for colon cancer screening. Companies like General Electric and Seimens that make CT technology are pressuring Medicare administrators too. More than 50 Congressmen are demanding that the decision be overturned.