It seems that the average salary for researchers in France (see for example here) is much lower than the average salary for professors (with both teaching and research duties) in any other western country (in particular, US, UK, Germany, Switzerland).
Is this difference motivated by substantially lower living expenses (e.g., real estate market, public transport, income taxes) compared to the aforementioned countries?
Where can one find data (or other information) on this topic?
Personally I spent several month in France, but in the form of many short (academic) stays, so I'm not able to evaluate precisely the cost of living permanenty there. However, I'm interested in moving to France, and I'm trying to make an informed choice. Therefore, another question is
Where can one find useful information about living in France aimed precisely at scholars (e.g., dealing with two-body problem)?