I've known only one other person to share that view; a toxic as fuck manager. What he (and I can be very confident you) are saying is "fuck you got mine". Income opens a lot of doors and letting a company (and those leading it) ride high off of your work just because the employee should be "living a happy life with what they have" is fucking bullshit.

If you're paying your employees porportional to the value they bring to the company (and both of you agree on this) there are no downsides to having transparent salaries. The system breaks down when the employees find out that the managers telling them "you don't need income to be happy" are making 5-10x everyone else while complaining that budgets are tight.