I must confess, this was a few months ago, but thought I might share this.
I was just generally unhappy with my work, not just with the salary but the work itself. And eventually, I had gotten a new job through an old friend of mine, where I had gotten about 20% increase in my annual salary, as well as other extra benefits.
When I handed in my resignation to my old work, my managers have asked if I would consider “compensation matching”. I had already checked myself out from the company, long before that, and I still cannot forget how disgusted I was with the initial salary negotiation process, which was, put it mildly, infuriating, because they offered me a salary below the industry norm salary range scale for the role, and they would repeatedly say “it's because of your lack of experience.” This was an ironic comment, because the person who had pushed really hard for me to take, not to apply, to take, the role was my manager, and he was pressuring the HR to offer me the role, and even messaged them for a better compensation, knowing how unhappy I was with the offer. It was because I was the one providing most of the information needed for the role in question. Essentially, they wouldn't need to do any trainings and I could get into that role, which I supposedly have no experiences in, right away. I also knew that the floor of the salary for the role based in other cities in the same company were higher, which I did point out, but they wouldn't budge.
I must admit, I did, and still do, like my managers (still keep in touch with them), and the whole negotiation was done by the HR people, so I don't really have any negative feelings toward them, but after pretending to think for a moment, I just looked at them and told them
“With all due respect, you won't. You don't even pay that much for a role above mine.” And both of my managers knew that I wouldn't stay and wished me the best.
The lesson I learned from this experience was… don't let some fucking idiot to try to set your worth, because, there are many others who will value you so much more than your current employer will, both financially and non financially.