Which is why we use PPP metrics (parity purchasing power). It aims to answer: "with the amount of local currency I make, how many goods and services can I get?"

Which is why we use PPP metrics (parity purchasing power). It aims to answer: "with the amount of local currency I make, how many goods and services can I get?" It's not perfect, but it's definitely something present in considerations of whether a country is rich or poor (country X can be poorer than Z in nominal terms, but is richer in real terms -i.e. PPP terms- than country X)