You're not looking at the cost of living. your actual income is usually irrelevant. you could be making $100-250k, it doesn't matter, if the cost of living (and being able to actually get to your job) is 95% of that income.
For example, my buddy moved to the UK from BA where he was making $8000/mo and living paycheck to paycheck and going into debt. they didn't tell him they would cut his salary down to $4500/mo until he actually got there. He had a panic attack, until his first set of bills arrived, and he realized he still had some 80% of his paycheck left for himself due to drastically lower cost of living.