This is a great description of Narcissistic Personality Disorder. Although I haven't seen something define the mechanics of the relationship so well. The real question is, why would you want to keep people trapped in a failing system? It has to do with the the aggressors own fears of inadequacy.

Also, if you find yourself a victim of this type of relationship, usually there is something that you need to fix about yourself. Seek good professional help. Otherwise you risk "escaping" into an identical situation. A healthy person would probably run at the first signs.