Although Social Security reform has received considerable attention in recent years, Medicare is the far-bigger problem. Medicare is growing at a faster rate and has an unfunded liability six times the size of Social Security.
Medicare is also on a spending path that will be difficult to sustain without unprecedented boosts in revenues. The reason: Per capita health care spending over the past half century has been rising at a rate two to three times faster than per capita gross domestic product (GDP). If this trend continues, health care's share of the economy will grow considerably: