Believe me we've been punished, whether it was imposed from elsewhere or self-inflicted is hardly relevant.
On the contrary, that's totally relevant.
If I decide I want to run someone over in my car, and in the process of doing so I also get badly injured, write off my vehicle and then see £50,000 life savings, which I'd been keeping in my boot, fly out on impact and land in the nearby river, I can't then claim to the judge when I'm in court that I've been punished enough and should be given no jail term for my actions. Just because I've deservedly suffered some nasty consequences doesn't mean I shouldn't also be punished for my law-breaking in the usual way.
Hofz that's a terrible analogy. In this case the driver of the car was killed. You want to prosecute the guy who bought the car off his widow.