Then to borrow an economics trick as an easy way to get around exchange rates and local costs of living ...
"How many standard Big Mac's can you buy in the country/city within which you're based/live in one year with your take home pay?" No price discounting of the "sandwich" allowed.
Find the price of the burger in a local franchise and divide it into your net (no swapping for Whoppers or other local alternatives ... comparison has to be like for like).
For transparency, it might be helpful to post your net too (in your local currency).
Just a thought.