Earlier quoted context omitted.
The dynamics of capitalism put wealth into the control of its wisest custodians - frugality being defined as among the wise virtues in this context. For those who argue that democratic government is the wisest custodian, e.g. there is estate taxation and government redistribution and investment.
Are you saying rich people are wiser than poor people therefore they deserve to be rich? Capitalism made Justin Bieber rich. This makes him a wise custodian of wealth. Not only is my previous statement wrong, but so is yours.
With regard to Mr. Bieber, or celebrities/sports stars in general - there are many foolish ways for them to lose their wealth and only a degree of frugality, i.e. living within their means, will preserve it.