I can't think of any circumstance where it wouldn't be in the individual contributors' best interests to tell each other exactly what they all make. If everyone

I can't think of any circumstance where it wouldn't be in the individual contributors' best interests to tell each other exactly what they all make. If everyone on my teams shared their salaries with each other, it would lead to two things: a) some short-term bad blood and awkwardness, and b) some underpaid people getting raises or quitting. And I think my bosses, especially the old-school ones, consciously play up a) and treat salary as a giant taboo to avoid b). A previous employer explicitly stated in their contract that disclosing your salary was a disciplinary offence!