bourgeois rule about money

You're not supposed to say how much money you make, but why not? The bosses don't want us to know. The people with the big paychecks don't want us to know. It is some kind of bourgeois rule. My new insurance premiums kicked in and my last paycheck was $527. For one month, 30 hours a week. Less than $5 an hour. I work in a school library, as an "assistant," although, functionally, I'm the librarian. Yikes!