Billionaires gonna have affairs. All of them. It's the natural order. Some are just more careful, but they have pretty public lives to that can be difficult.

Its human nature. Give someone unlimited power/money, and everyone would morph their morality.

So maybe, think about reducing the number of billionaires, rather than holding them to some standard that will never happen.

What billionaires do, is un-preventable, need to not have billionaires.