By the way about life question - here are people from a large number of countries, and most likely all continents.
We can think of some generalized "consumer basket" - a set of goods and services consumed by the majority of participants, and calculate the price of this basket. In national currency, in terms of the dollar, and in terms of the value of gold (this will allow to get an objective assessment of the cost). And also in these measurements we will collect the level of minimum pension, minimum wage, average wage. And we will get a realistic picture. How do you like the idea?