As far as your example, I find it bizarre that you find a person threatening to kill you with a weapon in your face is on the same level as someone who empties your bank account behind the scenes. The latter is more financially devastating but the first is more terrifying to be on the receiving end of and could result in you dying or being crippled.
Further, I didn't really have in mind some guy doing a hold up. I was thinking more about murders and people who will do violence to others if not contained.
And finally, it's not about "evil" and it's not about what someone "deserves". Throwing someone in prison doesn't fix anything. It doesn't make them stop committing crimes, in fact it usually means they'll commit more when they get out. It might make some people feel better about themselves to know that someone is suffering, but I would question the mental health of that point of view as well.