And it very much is.
>It's hard to reconcile that view with the fact that standards-of-living have been growing, more or less worldwide, for the two centuries.
Those are not personal wealth.
Increased standards of living are a kind of background element, as they are more or less shared by the population. Statistically they even out, and only differences from them matter.
A guy living in a trailer park today, with a tv, microwave, electricity, some medical access etc, would be considered living like a king, compared to a 1600's peasant working in some feudal farm. That doesn't mean he feels (or is viewed) as such in our society.