Comment by Bonogongo

It sounds like you have done this in the past, and it is blackmail.

And I understand that you don't want to see yourself as a blackmailer.

"I'm more worth than that" and leaving is standing up.

"Give me more money or I leave" is blackmail.

"Regarding your Wikipedia quote, leaving a job in which you are abused and underpaid is not at all unjustified."

Leaving is not the blackmail part, threatening to leave is the blackmail part.