Are you serious? You think it's ok for average Joe to have all his private details and exchanges available to the fucking world.
Also news fucking flash, a person salary is no way linked to their right to privacy. That's an absolutely abhorrent attitude.
I am not endorsing or defending this leak, but these exchanges are not personal either. They are company property and in no way private, they do not represent the views of the individuals. It's one of the first things they teach you in business communications. It's called trade secret. Exposed secrets that have been mitigated by now. It sucks, but that's life.