Here's a thoughtful piece by Judith Warner.
http://www.nytimes.com/2010/06/20/magazine/20fFOB-WWLN-t.html?ref=magazine
I agree with much of what she wrote, except the part about something
being "amiss in our inner mechanisms". Our inner mechanisms are still
working, especially the mechanism of beliefs giving rise to feelings
that energize behaviors. In a "culture of excess" lots of folks have
bought the belief that more is better. Feelings of "insatiability"
logically follow from that. Using beliefs that support self-
regulation, we curb even "pathological" excesses.
Still peddling beliefs,
Thad