The term Voluntary Simplicity can sound a bit patronising and probably pisses off those who are involuntarily poor! I've always been skint so don't know any different.
I read an interesting book about VS, and other things, called 'Living Lightly' by Walter and Dorothy Schwartz. Lots of case studies and pics of folks who are looking for alternative happier ways of living, and not the slightest bit preachy or patronising.
A recent study has shown that a person's perception of happiness starts to level off after their salary reaches approx £15,000k. After this amount, there is not much difference in happiness levels. So it seems money really can't buy happiness?