Greed is actually an excellent source of drive and can be utilized to keep companies in check. John Stossel did an excellent special on this - aptly titled, "Greed," - whose message has stuck with me ever since I saw it about, oh, probably 5 or 6 years ago. Unfortunately, I don't remember many of the details, but I remember the clear conclusion - greed ought to be manipulated as opposed to squandered. It is a natural human feeling and attempting to deny it has done nothing but create problems throughout history.
http://www.objectivistcenter.org/cen...ssel-greed.asp
Again, I'm going to be flat out honest here and point out that my primary draw to Libertarianism is individual rights, not a significant knowledge of economic *solutions.* All I have to work on is what I've happened to pick up over time, and, as with most things, what sticks most is the effects as opposed to the cause. I do know that there are solutions which respect individual rights though. They must be sought out. I have confidence in the potential for viable economic solutions when a movement is backed by the likes of <a href="http://en.wikipedia.org/wiki/Milton_Friedman">Nobel Laureate Milton Friedman</a>
An equally releveant program is "John Stossel Goes to Washington."