I'm fine with the established dictionary definitions of words. Thems my parameters.
You say need a billion dollars to accomplish your goal. That may be true to accomplish your goal but the goal itself can fall into an excessive desire for money. You seem to be looking for a loophole for a concept (greed} that has been around for a long time. The definition doesn't allow for it though.
Again, the scope of the term's application doesn't need to adhere to your esoteric standards--which you're scared to death of actually identifying. It doesn't discriminate between one need or another.