1) an enormous sum of money (unlikely) or 2) fear for his own life or the lives of his family.
We have seen how the "power elite" seem to be desperate to keep Saddam propped up (including such "republican" NWO-types as Scowcroft and Eagleburger -- presumably GHWB also). if this perception is really true, it's not hard to imagine the death threats on Ritter to shut up, or better yet, play ball with the Powers that be.
I wonder if Saddam plays some important role in the coming New Order. (The only role I can see is maybe they are hoping he nukes Israel, the one country the NWO will never corrupt or win over.) Just MHO.