> housing and pensions are obligate sinks of wealth.
Everyone needs some housing and some provision for old age.
That doesn't mean that all of a person's housing and pension ownership should be ignored when figuring out how well off they are.
Ruccio's methodology would treat someone who's completely broke, living from paycheck to paycheck, barely covering their food and rent, as being in the exact same situation as someone who has a $1M house and a $1M pension fund, and has chosen to sink all their wealth into those things.
That certainly makes it easier to tell a story of how the super-duper-rich have all the wealth, since it reckons our hypothetical only-kinda-rich person as penniless. But it doesn't seem to me like it gives an accurate account of things.
For the avoidance of doubt, I completely agree that there's a hell of a lot of inequality, that there are super-rich people with vast amounts and many millions struggling to meet their basic needs. Nothing about that depends on whether or not you adopt Ruccio's way of calculating wealth distribution statistics.
What Ruccio's trying to do, though, is to do the calculations in a way that collapses all distinctions between the poor, the middle classes, and (some of) the kinda-sorta-rich. And, surprise!, when you do that it turns out that the really-rich have all the money.
But I think that actually weakens the case for outrage about the divide between the super-rich and the not-rich. Because if you frame things Ruccio's way, it gets harder to sustain that outrage once you realise that the poor immiserated people Ruccio's comparing with the super-rich include people who own fancy houses and have comfortable retirement funds.
Might as well make a new graph showing that 99% (or whatever the figure actually is) of the world's yacht wealth is in the hands of the super-rich.