@amiloradovsky@functional.cafe Well, you saying that it's about higher comfort, implies that you know the expenditures, not just the income. Otherwise you wouldn't be certain it's higher comfort and not medical bills or "inherited" loans. I initially interpreted it as "this number that is twice my number, must mean higher comfort" which is not universally true, unless the difference is taken to an extreme.

I read the other replies, but didn't get this context of donation. In that case I would say that even the trivial measure of wealth is uncertain. The donors might decide to stop on a whim, so if you want to support someone today and are able to do so, you should, since tomorrow you or other donors might not be able to. One could call it subjective income, in contrast to objective, where one would be paid for the job done, regardless of how "likable" or "worthy" they are otherwise.