I first thought it's some anti-inflation speak but it can't be since they want inflation in their system too and not all currencies inflate all the time (i.e. Swiss franc, but then again they might not care about Switzerland). Similarly they mention UBI and climate change being absolutely stonewalled which is totally not true in many European countries (EU has strong environmental agenda overall and Finland is experimenting with UBI on its own this year). This leads me to believe that their definition of 'world' is some subset of the first world or even just USA itself.

Try "purchasing power of $your_currency" and you will find stuff like that:

http://www.visualcapitalist.com/buying-power-us-dollar-centu...