Can this be repurposed as an independent price index/measure of inflation? That is, independent of the World Bank/governments and government-funded economic bodies, which could be useful
This seems to be deliberately targeting "expat prices", which can often diverge significantly from the local cost of living. For example the price for a furnished month-to-month-rent corporate apartment lease does not necessarily track the regular housing market. It might be useful for something, but I would be careful about using expat lifestyles to generalize about a region's economy.