Why do we want more money?

Everybody wants more, for reasons that can be categorized as either:
-         Security
-         Power (ambition, achievement, self-confidence)
-         Enjoyment (of experiences)
-         Altruism
-         Or freedom of choice
Very few of us want money for money’s sake, but for what it can allow in our lives. Yet many of us seem to have lost sight of our ultimate goal; we [...]