I think envy is a close relative of greed because most likely many who are greedy are that way because they are envious of others who have more fame, fortune or whatever they seek.
President Obama used this negative value quite adroitly in his re-election campaign. That is a very bad sign for America.
But I am the eternal optimist; I believe if globally we teach everyone to view those with more means with respect, curiosity and admiration—rather than envy—amazingly good things would come about for all. We might learn from others who possess that which we seek and use that knowledge for self-improvement.