No, no and no. Everything is negotiable, and employers don't need to know your previous salaries. They want it as a negotiating tactic only, there is no other l

No, no and no. Everything is negotiable, and employers don't need to know your previous salaries. They want it as a negotiating tactic only, there is no other legitimate reason to require it. Any company that would bar you from employment for (tactfully) refusing to provide this information is not a place you want to work.