I remember reading an article where the author pointed out that the hallmark of good science was the discarding of failed theories.
And noting that economics never discards a theory. (tags: historyeconomicsfail )
This is on top of, of course, the "Money as a way of not being hungry/homeless" and "Money as a way of not letting your lifestyle decrease", both of which impact on happiness. (tags: moneytimehappiness )