Bruce Bartlett takes a look at the debt and how much it matters (a lot). And then debunks the ideas that cutting taxes and "growing out of it" will work:

Some Pollyannas, like my friend Larry Kudlow, think we can just grow our way out of the debt by cutting taxes. But this is not really possible given the magnitude of our problem. First, increasing real growth doesn't have as much effect on the debt as one might imagine. According to OMB, raising the rate of productivity, the basic component of real GDP growth, by 0.5% per year over the next 75 years only reduces the long-run fiscal gap by 17%.

Moreover, raising productivity even that much would be hard; over the last five years the productivity growth rate has averaged 1.8% per year, so we would have to raise it by one-fourth just to reduce the projected debt by 17%. And we can't very well expect investment to raise productivity very much when the federal budget deficit will be absorbing a huge percentage of national saving, crowding private borrowers out of the market, which will reduce business investment. Lastly, it's highly unlikely that further tax cuts will do much to increase growth when they will add to the deficit and taxes are already at their lowest level as a share of GDP in almost 60 years--more than 3% of GDP below the postwar average. In any case, the biggest problem businesses have today is a lack of customers, not high taxes."

His solution isn't sexy. Higher taxes and less spending.