In Blank's perfect world, this is how that scenario plays out.
Number 1, the guy wouldnt have a gun because guns wouldnt be available to the public. If he took hostages with a knife or some other object, the police would storm in and shoot him with beanbags or some other nonlethal weapon type. He would then spend the next year of his life visiting a therapist, in which case the state would probably declare him unfit to return to work, he would then be set up in a nice section8 home where he no longer had to be stressed out by the the obligation of bills or working, he would then live out the rest of his life peacefully while be cradled in the loving arms of father government. There's no such thing as punishment in this world, everything about life caters to the inadequacies of each individual. There's no fail or succeed, there's only do or let someone else do for you.
That's blank's world.