Like others have said, our job is very attractive. He (or whoever comes in) can't lose.
If he keeps us up, he's a legend and a miracle worker.
If we go down with him at the helm, it won't be his fault.
The excuses for taking us down are already written for him - not his fault.
If we don go down, he'll probably stay in the role, as it'll be viewed as 'part of the plan' 'expected', he'll be the man to bring us back up.
He'll also be well paid, and have no problem leaving us, should one of the bigger fish come calling