Change location based pay to gender/race/religion/veteran/disability/etc* and half of the comments talking about market dynamics will have a very different ring to it. The change will be slow if it happens at all, after all many paychecks and bottom lines depend on not acknowledging the situation. The best you can do is probably raise awareness in the meantime and not feel shame about being demotivated.

https://elsajohansson.wordpress.com/2017/09/13/what-does-a-w...

*people are as much in control of their religion and veteran status as their location