Why? Number one, Steinbrenner doesn't have to fire him, his contract expires at the end of the month. But more importantly, Cashman deserves more credit than Torre for the team's return from the near-dead, cuz he was the one who had Wang, Chacon and Small to save the team. Furthermore, if I'm not mistaken, it was the idiots in Tampa who said "sign Tony Womack!"
Cashman has been in an impossible position for a long time: He's hardly in full control of the team, he has to battle the Tampa morons every day, yet he's the public face as the GM, he has to act as if every personnel decision was his even if he fought it from the start. Add to that the way Steinbrenner treats him, its time for Cashman to say "screw you, George" and finally get out of there.
And anyway, he won't get fired. This man will get fired:
So that George can bring this man back:
After all, he's got fire.