Because it's Sunday -- a day of reflection about the non-material -- and since we owe at least some of our wisdom to pop culture (from the Beatles to Annie Lennox) our thought for the day is once again about money's inability to satisfy. 

Here, we quote Amitai Etzioni from his article The Post Affluent Society (with internal citations omitted).

higher income does not significantly raise people's contentment, with the important exception of the poor.  A longitudinal study of the correlation between income and happiness demonstrate two things.

First, that at low incomes the amount of income does correlate strongly with happiness, but this correlation levels off soon after a comfortable level of income is attained.

Second, that during the decade that passed between the interviews, the individuals' incomes rose dramatically, but the levels of happiness did not.

People who live in poorer countries often have a better quality of life than those who live in more affluent societies. [Many] question[] whether the GDP [is] a sound measurement of well-being and suggest[] the need for a much more encompassing measure.

Psychological studies make even stronger claims: that the more concerned people are with their financial well-being, the less likely they are to be happy.  .  .  [M]oney fails to satisfy in an era of excess.  

Id.