I will also echo those who suggest that firings should be ramped up in the BCS conferences -- particularly with elites and near-elites. Lots of resumes that we all could post and be stunned that people kept their jobs.
That said, it is a tough thing for WIS to manage -- they don't want to (and can't afford to) alienate too many people. So they do have to be a bit careful to protect themselves. But right now it's nearly impossible to get fired at a big-time school, and that definitely needs to be corrected.