What are the chances the U.S. economy could eventually trigger violence in our country?

A long-running theme in this blog is starting to gain traction in the mainstream media.  I hope we're wrong.
http://caffertyfile.blogs.cnn.com/2011/06/08/what-are-the-chances-the-u-s-economy-could-eventually-trigger-violence-in-our-country/?hpt=hp_t2