Rizzo should quit. If I'm the GM of a team and constantly having my plans for improving the team vetoed, I'm going to quit and sing like a canary the every reporter I can.
If he's worried about getting another job, the actions of the Lerners aren't making him look very good as an executive. So he's not losing that much.
Sounds nice, but not too many people walk away from their paychecks. Rizzo would certainly be hired elsewhere, but how many GM positions are available right now? And scouting jobs don't pay half as much.