Those measures tend to be pretty dumb though because “comfortable standard of living” is very subjective. I know people who think a 2BR apartment in Manhattan is awful compared to an acre on the edge of a town with a manufactured 3 bed/2ba home, 2 car garage, and a workshop.
So the equivalent “comfortable standard of living” they’re used to in Manhattan would require a $5 million annual salary.
I'm aware of several teams that have done this with success in the past. Everybody, no matter their region of choice, gets compensation enough to enable an appropriately comfortable standard of living desired based on the actual costs of living where they choose. This is what we're talking about when we advocate for adjusting salaries for COL. It creates incentive for your employees to live where they actually want to live, work, and be happy - rather than wherever they feel like they can extract the most cash value from the company.