These figures aren't used to compare tragedies across countries in a professional setting. It is always about how a government should allocate aid resources or distributions within their own economy.

Except for foreign aid in which being devalued works strongly in the favor of poorer nations. Ie if I have 10 million in aid money to spend and I can buy 10 housing units in Germany or 1000 housing units in Uganda because the currency goes further, that money is going to be routed to the poorer place.

So this is a total strawman. No one respectable (and I mean 0) is using these figures to compare human worth between economies.