Is there any standard source for cost-of-living adjustments between different countries? For example, I'm trying to figure out how to adjust a salary whether the employee is in the United States, Canada, Mexico, Brazil, India, Pakistan, Dubai, Poland, or Germany. And really any other country that pops up in the future as well.
I don't want to choose something arbitrary. When I Google salary converter, I get links like this (salaryconverter.nigelb.me) or this (paritydeals.com/ppp-calculator).
If you are an employee at a company that offers different salaries in different cities/countries, what are these rates and how are the sources communicated to you? Or if you work in HR, how do you ensure you are setting these rates fairly?