> So what about when two people have the same title, and tenure but one makes $50k more per year?

Strangely enough that's a lot less viscerally unpleasant - perhaps because money is quite abstract (and you never actually see person A get a bigger pile than person B, whereas you notice immediately if there's a team pizza that person B isn't allowed to eat), perhaps because it's understandable that companies want to pay some people more and others less, whereas limiting who gets cheap perks feels like it's just nastiness.