Worked 3 years at the same company, begun with 20k pre tax, currently at 24k a year, pre tax. I tried to apply to another company in neighbouring country and th

Worked 3 years at the same company, begun with 20k pre tax, currently at 24k a year, pre tax. I tried to apply to another company in neighbouring country and they offered me 24k as well. The thing is, median annual pre tax income is ~10k and my yearly rent with utilities for 50 sq meter flat is ~5k. So, on one hand I keep thinking "Wow, my yearly rent would cover maybe a month in SanFran" on the other, "I know that there is someone in my company making 5 times as much for the same amount of work just because he lives someplace expensive." So, I kinda find myself underpaid in comparison, but I have been on the other side of the hiring table as well, and I even I wanted to have as good colleague as possible, that wouldn't break our hiring budget at the same time