How much is enough?

In an incredible book "The Geography of Bliss",Eric Weiner writes about what makes people happy. He reports that in Switzerland the prevailing belief is that envy is the 'enemy of happiness" Weiner notes as well that the more you have the less meaningful the little things you enjoy become. Most intriguingly Weiner reports that materialistic people are less happy than those who are not. This is a great book that covers how a number of countries such as Bhutan(whose king actually has something called "Gross National Happiness" part of the country's economic equation)defines happiness.
My thoughts while reading this book had me focusing on two things. One was the classic George Carlin routine on "stuff" about getting more stuff and having to have a bigger place for more and more of your stuff. The second was on my continued concerns about greed in the US. In a recent edition of Too Much, the authors reported the case of Larry Ellison, the CEO of Oracle. Mr.Ellison is worth $27 billion but he fought a tax appraisal on one of his homes which resulted in a $3 million tax refund. This tax refund cost a local school system the price of three teachers per year. Just how much is enough? Would Mr.Ellison even feel the $3 million. It seems to me that the less you have the more an amount of money you'd feel. Its like having your favorite dish-day after day after day after day. I would think after a while, the meal would loose it appeal.
I keep thinking,is this narcissism? Is this the result of a trauma,where the person suffered a separation that produced an emotional void. I wonder if greed is an addiction-where the addict just needs more and more and more. Where there is this void and needs to be filled because if it isn't,filled there are terrible feelings of abandonment, hurt and pain that the addict doesn't want to feel.There is the impossible quest for perfectionism. Addicts also have a sense of grandiosity. I heard a great expression: an addiction is basically a "G_I" series-with grandiosity masking insecurity. With addiction, the worse it gets the more and more is needed to experience the same high. Too much is not enough.
To paraphrase George Carlin, "if you have most of the stuff, there's not just enough stuff for the rest of us."