Those wealth statistics really are dodgy. Another edge case: you're earning so little that you don't save, but spend it all on food/housing/etc. Now your countr

Those wealth statistics really are dodgy. Another edge case: you're earning so little that you don't save, but spend it all on food/housing/etc. Now your country's economy takes off and you suddenly earn 20% more. You're still spending it all, enjoying much better and healthier food. To those statistics, nothing changed. Net income is a much better metric than wealth.