Rising federal debt creates a death spiral for the economy

"Here's how rising Federal debt creates a death spiral in the economy. As Federal debt skyrockets, the cost of debt service rises, even at super-low rates of interest. That means taxes must rise, because no constituency will allow its share of the Federal budget to decline by more than a symbolic amount. Higher taxes means there will be less money available for new investment, and the enormous sums of Federal debt that have to be sold crowds out other investment."
--http://www.zerohedge.com/news/guest-post-about-20-trillion-public-debt