[prepend]

> Trying to boil down a very diverse global population, which may or may not even be paid, into a single $/day seems a bit ridiculous to me personally.

This is not the method described in the world bank web site. I don’t think the intent is to boil down to a single measure.

Tracking data globally is really challenging, so a consistent and meaningful measure is required to even have a hope of a perspective across countries. It’s useful in eradicating poverty to both measure progress or failure as well as to prioritize investment for areas of greatest need.

This also isn’t the only measure of poverty as there’s many others and there’s quite a bit of literature in global health on other measures as well.

That being said, I think there is room for improvement both in developing more useful metrics as well as improving accuracy of measures.