Luckily we can design systems that aren't influenced by greed, and are as efficient as technology allows. I'm seeing greed more and more as a battle between short-term vs. long-term thinking, selfish vs. holistic.
I agree with selfish vs. holostic, less so with short-term vs. long-term. You could have someone doing the long con and in my book they are just as greedy as the short con. Better at deferred gratification perhaps, but just as greedy.