In his New York Tiimes column today, Paul Krugman points out the imperative in health reform:

Health care reform hangs in the balance. Its fate rests with a handful of “centrist” senators — senators who claim to be mainly worried about whether the proposed legislation is fiscally responsible.

But if they’re really concerned with fiscal responsibility, they shouldn’t be worried about what would happen if health reform passes. They should, instead, be worried about what would happen if it doesn’t pass. For America can’t get control of its budget without controlling health care costs — and this is our last, best chance to deal with these costs in a rational way.

Some background: Long-term fiscal projections for the United States paint a grim picture. Unless there are major policy changes, expenditure will consistently grow faster than revenue, eventually leading to a debt crisis.

What’s behind these projections? An aging population, which will raise the cost of Social Security, is part of the story. But the main driver of future deficits is the ever-rising cost of Medicare and Medicaid. If health care costs rise in the future as they have in the past, fiscal catastrophe awaits.

You might think, given this picture, that extending coverage to those who would otherwise be uninsured would exacerbate the problem. But you’d be wrong, for two reasons.

You can read the whole column here.