This guy had such a sweet deal at Google originally, it staggers me that he'd go to these lengths to steal even more. He was getting a massive salarY, bonuses in the millions, and he had persuaded Google to pay him even more money through a side-hustle company of his while remaining an employee. Then he quits and steals their stuff.
If I had to guess, I'd say it's actually clearly correlated. The same underlying ego could've driven both the ambition and rewards he got at Google (after lots of rule-bending) and the brazen theft.
People who know when to quit will usually not have made that much money in the first place because it's a different personality type almost.