Umm, this ain't exactly new
They don't need your personal data for this, they already know the value of a role, and will always offer the lowest.
My personal data will have little relevance if I've done my research into the value of a role. They can offer what they think I want, but if I know their actual range, and where my skillset falls, I can put forth what I want, not some minimum.
This is what bothers employers today - they know that data is now easy to come by for potential hires.