I just visited some friends in southern California and the possibility of me moving out there came up in conversation. So, I used a cost of living calculator to figure how much more I would need to make to be at the same level... 60% more. Definitely not going to happen.
Meh, it's not impossible. My salary went up 50% when I moved here.
Before: 100k / 12k ($1k/month) = 88k After: 150k / 48k ($4k/month) = 102k
Sure, you say to yourself that you ended up with an extra 14k, but then you need to still factor in the rest of your increased costs. And you should probably recalculate everything as an hourly equivalent since you'll likely add 2 or more hours to your daily commute in exchange for keeping that house cost bump at a mere 4x.
The numbers shift based on where you are and how much you make. The point is that a large number of people don't properly factor in all the actual and implicit cost and quality of life changes.