because you also need to factor in the cost of healthcare, paid days off, sick paid sick days, property prices, cost of living, parental leave, social safety ne

because you also need to factor in the cost of healthcare, paid days off, sick paid sick days, property prices, cost of living, parental leave, social safety nets, crime rates, social mobility, labour protections, regulatory standards and countless other things that contribute towards overall satisfaction as a developer in either country. Just saying "makes less than a programmer in the US" isn't enough to make a comparison.