Pachauri Should Resign as a Result of Climate Gate

Why would Dr. Rajendra Pachauri, the head of the UN climate change panel, feel the need to resign over the latest blow to the credibility of the IPCC?
I mean - he is not a climate scientist, he has been linked to businesses that will make billions from so called green jobs and as the head of the IPCC panel on climate change he is ultimately to blame for the false reports being presented to the world. If that doesn't convince everyone that he should step down we can look back to 2007 when he represented the IPCC in the sharing of the Nobel Peace prize with Al Gore.
I have trouble typing Al Gore's name without throwing up a little in my mouth.