On the less serious parts of the Internet it's only Indian and Russian nationalists who bring up GDP adjusted by PPP to cope. Less serious people reply by calling it "Poor People's Points".
Perhaps it costs x billions to build so many missiles in the US so you might think that, say, India can't afford that. But on the other hand it is much cheaper for them to build a missile so all in all they might be able to build as many as the US.
Having lived in 6+ countries (rich and poor) there is no “equivalent” across many countries.
“Shelter costs” in say the US and Laos have no equivalent. The shelter in the US is unobtainable in Laos, so saying “$30,000 spent in the US is equivalent to $1,000 spent is in Laos” is not possible.
For China, I believe the government controls the exchange rate, which results in intentionally selling Chinese goods at a discount? Hypothetically, if they let the currency rise then they’d have higher GDP, measured using actual exchange rates.
For example with 500k euro in Paris Saint Germain you can afford to buy 25 square meters of poor quality apartment.
Chinese life expectancy is higher and their burden of disease is lower than the US.
So the question is - can you measure food safety from life expectancy?
Logically it seems not considering how many other factors affect life expectancy.
And can you think of the measurement of life expectancy might differ between countries making comparison challenging?