[jacquesm]

And, importantly: they indicate to the sitting crew how much they could make in their current jobs if they were to apply externally, and it isn't rare at all for that to be substantially more than they are making at present. So salary transparency helps employees evaluate their position across the board, not just new hires: if things are fair then there is no problem, but if things are not then employers will be loath to create such transparency because it equates to a break-off risk or an across the board raise.

[SauciestGNU]

Yeah this is exactly what I just went through, from making $70k-ish in a LCOL area to now triple that without moving. My coworkers knew their pay was low but not by how much. I did the best I could to be transparent with them on my way out. I'm curious just how many of them are planning on staying.