Obama's plan makes the problems of the current system worse.

With 30 million to 40 million newly insured persons under the administration's plan, aggregate health-care demand will increase significantly. But when demand expands prices increase. We estimate that the higher demand will increase health insurance premiums for the typical family plan by about 10%. Because an employer-sponsored family insurance plan cost $12,680 in 2008, this translates into an increase of about $1,200 in the typical annual premium.

The mandates will also have adverse additional longer-run consequences. According to provisions in both House and Senate bills, mandated plans must have low copayments and provide coverage of health-care services that is at least equal in scope to a typical, current employer-sponsored plan. But these are the very flaws that are responsible for high and rising health-care costs, flaws that stem directly from the misguided tax exclusion for and the extensive state regulation of health insurance. By locking in these flaws, the mandates will inhibit precisely the innovation needed to reform U.S. health care.