Lessons frugal billionaires can teach entrepreneurs

A study by the University of California also showed that richer people were generally meaner. [iStockphoto]

A good number of affluent people, many deduce, are stingy.

The ultra-rich who don't flaunt their wealth because Forbes will do it on their behalf, those whose money exceeds the budgets of entire countries, are said to be difficult to dish out money.