[kedean]

I'm not saying that people want to be secretive about their own salary, I'm saying people are afraid to know the salaries of their peers.

To use a childish simile, it's just like how most guys won't actually say how big their dick is, even if they'll talk about the general topic. It's not because it's "taboo", it's because they don't want to find out that their best friend is bigger.