The love of acting, of controlling a great performance, might have driven Marc Dreier as well as Bernard Madoff - not greed. Being able to take on other identities, being able to put that together in the form of a show might be as primitive a need among us human kind as the lust for sex, the longing for status, and the wanting to belong.
Why else would millions of highly educated flock to both coasts each year in hopes of getting started in acting? Why are we speechwriters and ghostwriters, who become successful by taking on someone else's voice, willing to stay in the shadows? [High-profile speechwriters/ghostwriters - e.g. Obama's - are atypical.]
Economic history might have been very different if master performers Dreier, Madoff et al. had received and taken a fellowship to study drama at Yale. The difficulty of becoming an actor - learning the craft and then learning how to make a living that way - might have soaked up all their energies. There might have been nothing left for the art of the con. Unemployment might not be at 8.5 percent - and expected to continue to rise. And a whole gen of attorneys might never have experienced th pain of losing their profession and having to start over again.