In Business Ethics for Dummies (p. 123), greed is defined as a basic desire for more. The authors posit a “reasonable greed,” which in business “fuels growth,” which in turn “creates jobs and adds value to a society [and] economy” (p. 124). The authors conclude that “in terms of this social and economic growth at least, greed is a good thing” (p. 124). This sounds like a partial affirmation of Gordon Gekko’s claim that “greed, for lack of a better word, is good” (Wall Street). As long as greed proffers good consequences—the greatest good for the greatest number—the desire for more is ethical, or “reasonable.”
The full essay is at "Is Greed Implicit in Christian Theology?"