I seem to recall a story about a Pepsi employee who made a bad decision that cost Pepsi over 10 million dollars. The CEO called him into his office, and the employee shuffled in saying, "I guess you are gonna fire me now." To which the CEO Exclaimed, "Fire You?! I Just Spent 10 million dollars educating you!"
They generally do not improve from moral/character flaws like being a power-seeking career-ambitious-to-the-exclusion-of-all-else asshole political climber.
Just something to think about here.