Nobody becomes a billionaire off salary. Generally speaking, billionaires come to be billionaires because they created something that has value in the billions.
Someone who has created their own worth saying that there are people being paid salaries without creating enough value to justify said salaries is not tone deaf. I bet most billionaires - at the very least, the self made ones, which is most of them in the US - have a better sense of value than most other people.
The comment isn’t about making too much money. It’s about being given too much money in exchange for what is produced.