Stuff costs differently everywhere, meaning amount of currency can not be used to objectively measure purchasing power.
Example: if a grade a candy bar (same quality) costs x in country x and y in country y, you cant say x > y or y > x in richness, because x =/ y in prices.
You autists should instead just post what you buy on average per day/week/month instead. This should be much more accurate. Because grade a product is a grade a product all over the world, x euros is not x euros all over the world, for local prices vary greatly.