[kongolongo]

There's a very consistent definition for what that means with plenty of papers and institutions that use use roughly the same definition. Here's one phrasing of it by the OECD[1]. Basically it's just income minus taxes, what part of that is remotely vague?

Discretionary income might be an even better measure but that has more wiggle room on defining what is a necessity and not.

https://data.oecd.org/hha/household-disposable-income.htm [1]

[feet]

I still don't see how that's a good metric, in any way, for judging health care costs. "Disposable income" takes nothing else into account such as other costs or predatory behaviors in the healthcare system

Its literally just money after taxes, and most people are living paycheck to paycheck

[kongolongo]

You can't judge how much of a burden healthcare costs are unless you account for how much of a person's income or some proxy of it healthcare is. Just saying that the US spends more per capita than other OECD countries doesn't say anything without more context. IF you want to show that the healthcare spending isn't efficient in the US you have to at least show that it's not just because everything costs more there or that everyone earns more in the US (gdp/capita is higher than ~85% of OECD in US).