"If they choose to let in a bloody murderer all because he makes a poor mouth at the last moment, that's their look out. But I don't see myself going in the same boat as you, see? Why should I? I don't want charity. I'm a decent man and if I had my rights I'd have been here long ago and you can tell them I said so."
The problem with moralism, which approaches God assuming we are good enough to do so, is that its irrational and destructive to others. In His parable, Jesus teaches us a better way.