Derivatives ARE the problem. We could fix the mortgage debacle, but we cannot fix the derivatives mess.
http://www.nytimes.com/2008/11/23/business/23citi.html?_r=1&ref=business&pagewanted=all
"Today, Citigroup, once the nations largest and mightiest financial institution, has been brought to its knees by more than $65 billion in losses, write-downs for troubled assets and charges to account for future losses. More than half of that amount stems from mortgage-related securities created by Mr. Maherass team the same products Mr. Prince was briefed on during that 2007 meeting. "