The approach taken by Igalia (a co-op) is quite interesting: https://wingolog.org/archives/2013/06/25/time-for-money https://wingolog.org/archives/2013/06/25/ti

The approach taken by Igalia (a co-op) is quite interesting: https://wingolog.org/archives/2013/06/25/time-for-money https://wingolog.org/archives/2013/06/25/time-for-money. Basically they target equal pay but adjust it for cost of living, rather than cost of hiring.