the price of pho in la vs thailand isnt set according to the currency. its set by a free market. a bowl of pho is $2 in thailand...you also make $5/hr. a bowl of pho is $20 in la but you make 40/hr. its consistent when you look at each country's currency purchasing power. setting the currency to a global price index means us worker can't afford soup. you dont need to peg the dollar to the cost of soup in your town. the free market works that out.
United States