The Obama administration has repeatedly claimed that the health-reform bill it passed last year improved Medicare's finances. Although you'd never know it from the current state of the Medicare debate—with the Republicans being portrayed as the Medicare Grinches—the claim is true only because ObamaCare explicitly commits to cutting health-care spending for the elderly and the disabled in future years.

Yet almost no one familiar with the numbers thinks that the planned brute-force cuts in Medicare spending are politically feasible. Last August, the Office of the Medicare Actuary predicted that Medicare will be paying doctors less than what Medicaid pays by the end of this decade and, by then, one in seven hospitals will have to leave the Medicare system.

But suppose the law is implemented just as it's written. In that case, according to the Medicare Trustees, Medicare's long-term unfunded liability fell by $53 trillion on the day ObamaCare was signed.

But at what cost to the elderly? Consider people reaching the age of 65 this year. Under the new law, the average amount spent on these enrollees over the remainder of their lives will fall by about $36,000 at today's prices. That sum of money is equivalent to about three years of benefits. For 55-year-olds, the spending decrease is about $62,000—or the equivalent of six years of benefits. For 45-year-olds, the loss is more than $105,000, or nine years of benefits.