[EBH]

They are talking proportion.

Yes, I would expect a poor person to spend proportionally more on food and housing than a rich person?

There is little to no logic in the argument as presented.

The comparison should have been decade to decade with the same class group.

[GeronL]

Yep. How much is the average west European spending on housing and food? Japan? South Korea?

[Svartalfiar]

They are talking proportion.

Yes, I would expect a poor person to spend proportionally more on food and housing than a rich person?

There is little to no logic in the argument as presented.

The comparison should have been decade to decade with the same class group.

What surprises me is that the poor's number is only 60% on food/housing. That leaves a decent portion of their income available, as there's not really anything else you can consider bare essentials.