> The employer doesn't know how much you'll work, if you'll quit early or give up or make mistakes or not bother to show up. Knowing salary is also useful for

> The employer doesn't know how much you'll work, if you'll quit early or give up or make mistakes or not bother to show up. Knowing salary is also useful for existing employees, and in that case (in the US) the employer likely does know all of those things.