On the individual level, too much wealth is not beneficial in any current society. In any current society, if people are really wealthy, their wealth takes away their freedom, in a very practical, or impractical way.
Substantial wealth attracts attention, both politically and by the media, and envy by neighbors and the consumers of mass media. Attention and envy result in social control.
The only real values in life are a comfortable death, and before that, during one’s lifetime, optimal sex. To possess a luxury villa, even with its own golf course, is no genuine value. Not if it’s a golden cage.
Most very rich men and women, and most famous men and women, have bad sex. Their richness or fame overly restricts them: paparazzi, or the press in general, take good care that wherever they go, they will behave (because they have a reputation to lose). There are few opportunities of the only kind that matters: new sexual opportunities.
Wealth, in current societies, only is useful if it is hidden wealth. If one can live one’s life without being under surveillance, but have the resources to experiment where one wants to live, or to live parallel lives. But one can not be as rich as Bill Gates, or any other billionaire, and keep one’s wealth a secret. Thus, to be rich is an asset only to a certain point, and after that, in current societies, it becomes a liability.