> inflation adjusted wages are actually up over the long term
Inflation is a tool for monetary policy. It doesn't track cost of living. For example, if luxury items become more affordable, but housing prices rise, inflation-adjusted pay doesn't capture this kind of negative effect on the working class.
It doesn't track cost of living? The way it's calculated is all about cost of living!
In the US, the official inflation numbers are based on a "basket of goods" meant to be representative of a typical person's spending. Housing currently makes up about a third of the basket, while luxury items are a fairly small percentage. Here's a pretty well-written summary, albeit with numbers from 2022:
https://www.pewresearch.org/short-reads/2022/01/24/as-inflat...
Changes in housing prices have a large effect on the BLS's inflation figures. Downward changes in the price of luxury goods have a small (and bounded) effect. Even if all luxury goods became free, the reduction in inflation wouldn't be all that much.