This article attempts to portray the general belief that money cannot buy happiness. I don't necessarily agree with the conclusion of the experiment and its validity has since been questioned. Here is a more comprehensive article explaining how you can still enjoy the various luxuries in life that have become routines because of money. They key lies in your attitude. I agree most of the arguments here, but we can go one step further.
I believe if you look at Maslow's Hierarchy of Needs, once materialistic desires are met in life, there are other needs you can satisfy. For instance, sitting atop the hierarchy are self-actualization needs. Questions like Why was I put on this Earth? How can I live to the fullest? have been begging for answers since the beginning of humanity. These are also the precise reasons that this blog was created in the first place! My message to the rich: Direct your energy to making yourselves better, and more importantly, making this world a better place to live!