Only if it makes you feel better. There's no degree of punishment that can be done to this person whom you've never met that can bring the dead that you knew back to life. There are no refunds for spending our civilization lionizing the massive accumulation of wealth by financial manipulation. The danger is in the system, not the random narcissist promoted into a position of power within it; there is an endless supply of narcissists.
It's a trick played on the living by the people in charge of punishment. If it were for the living, the living would have a lot more of a say than they do, and some of the millions that are spent on the process of punishment would go to the bereaved. The bereaved are the pretense.
The average peasant cares not for this cold utilitarianism. They want to see him drawn and quartered. This is not something imposed by the ruling class.
You are correct that it's only if the poster feels better. You are wrong about the reasoning. Unfortunately, sentencing takes into account the harm done, but not causing so much harm that the person then takes their life.
