Sens. Tom Coburn (R., Okla.) and Joe Lieberman (I., Ct.) have produced a Medicare-reform proposal. The bill would save Medicare $600 billion over ten years and extend the program’s solvency by 30 years. It would save money by raising the eligibility age to 67 by 2025, increasing premiums and co-pays, and means-testing benefits so that wealthier beneficiaries paid more. It would also curtail “Medigap” plans — which cover the difference between what Medicare pays and the total cost of a procedure, reducing the program’s already-modest incentives for seniors to economize on care.