I'm not going to disagree with you--I've said multiple times in the past (not sure if I've said it here) that I don't think it's possible to be both ethical and a billionaire.

But that's not really a defense of the behavior, and it's perhaps a sign that we should stop valorizing billionaires.

Billionaires become that way by creating products and services that people are freely willing to pay for.

Nothing unethical about it.