Thought experiment: Get a job, then move to a higher COL area, do you expect a raise? No. Move to a lower COL area: Somehow we expect lower salary?
Thought experiment: Get a job, then move to a higher COL area, do you expect a raise? No. Move to a lower COL area: Somehow we expect lower salary?
Many companies do have reasons to want employees in high COL areas, e.g. to be closer to the office, closer to customers, or lower travel costs.
And it is not uncommon to receive COL bumps upward when moving to higher cost locations. It is advisable to do this so that you keep your employees happy and don’t have them jump ship to other employers that will pay more.
Nevertheless, the highest tiers on the map are of course on the coasts, with mid-level tiers being parts of Colorado, Texas, Florida, etc. And the lowest tiers reside in flyover country where I live. But they say if you DO move permanently from one tier to another, your pay will be adjusted accordingly.