The Big Mac index is completely unrelated to savings in a country. You may not understand what these are telling people but that only makes them meaningless to you.
Oh but it is. BigMacParity index can tell you if you can afford the holiday in your country but not in another. I bet most people in EU can actually afford a semi decent holidays in the country they earn in. Obviously not all.
This is essentially a decent measure of "can you take x time of a break, spend a bit and not go bankrupt".
