In fairness, he was an exec making $7M per year - so not a nobody, but he was only managing 70 people (Credit Suisse was a ~50k person company), and obviously not the only person who should've went to jail.
For (1), were other people prosecuted? Maybe there was insufficient evidence or process issues that got in the way of additional convictions.
For (2), how does that excuse a crime?
Kareem's story is fascinating for many reasons and I don't find lying about bond prices to be a crime to hate someone over. But, a crime it is, nonetheless.
And don't give me the Yuppie Nuremberg Defense. "I was just following orders... because I've got a mortgage!" That doesn't fly when lives are on the line.
This is reality. Decisions aren’t kill/not kill.