Alan Blinder, Princeton University professor and former vice chairman of the Federal Reserve, says the biggest reason for the growing deficit in the years out to 2040 is because of increases in health care spending. Its not that there is runaway spending in other areas. He cites CBO projections that show other costs stable relative to GDP from 2015 to 2035 and declining. This is why healthcare spending is at the heart of the problem. And why tackling the deficit has a lot to do with reducing healthcare cost increases.