> But we're specifically talking about someone who already has a job at Gitlab here and how the CoL adjustment affects them and the weird situation it creates, so the competitiveness doesn't really matter, they've already got the job.

Of course the competitiveness matters. It informs the level of optionality and leverage they have to negotiate. I would say that it's the only thing that matters. What about the CoL adjustment is weird besides it being reflective of the somewhat ugly and distasteful truth that to the company, you are a human resource and fungible cog? That's what they're paying for.

This employee will have to think about what happens if they do not come to a favorable agreement with their employer. Their BATNA completely depends on 1) the demand of other firms in the area (or remotely) and 2) their relative ability to compete. If they can perform well enough to move to a competing employer in the same locale that pays better, they will.