Sorry skypilot where were those figures re purchasing power of $ from ?
at 1st glance it doesn't even seem to take into account ave wages..let alone gdps type info. surely you can see how that's a very narrow way to look at it : if so? these are currencies not stores of wealth. they're purpose to facilitate economic activity : So as necessary more is produced.. their strength or value is measured by strength of the economy of the country producing the currency ..not how much of the currency there is in circulation.thats how I understand it anyway..Im sure its much more complicated than that though with every economist having their own reasoning for changes in value.