This is an idea that Logan did indeed float but very quickly (and wisely) rejected. It is a ludicrous idea, and they very quickly realised that people would leave before they committed to a bond for something that they have earned by working hard and staying with the company whilst their colleagues moved on.
Don't sign a command bond wherever you are, especially in the TP world! The market is so buoyant at the moment that if companies are trying to force their potential Captains to stay they should just move on to somewhere they are treated like a person, not an object. I would have refused to sign one at LOG outright.