money is basically a universally transferable method of trade. back ago people would grow their crops, now they grow food to trade for live stock. however the people with the live stock do not need crops so the people with the crops get no live stock. however, if the people with the crops sold their crops to someone for money, they could then buy live stock with the money which the people with the live stock could use. this is a basic example of how money allows things to be traded indirectly. this is the role of money, its root. obviously it is not evil, nor was it designed for any such purpose. greed is evil. money can give rise to greed. however, greed in a sense does not exit if a person is working for it. to say bill gates is evil because he is rich is stupid. to say the person who steals money is evil can be justified i suppose. the point is money is not evil, without it people would spend ages trying to find someone willing to trade their crops.
greed for money, for food, for anything is what you mean.