These things are much more complex than simplistic single-variable models.
It is not actually more complex, you don't spend ~40% of CPI on apparel.
Much of what you can buy today did not even exist 30 years ago. For example, trail running shoes more or less did not exist. Perhaps you could have had a pair custom made, at a high price, with the worse materials available at the time, but today you can them "off the shelf".
Even the many shirts I've received for free are very high quality and have endured years of abuse.
Do you have a source for this? Anecdotes along the lines of "they don't make 'em like they used to" are incredibly common but often fail to stand up to scrutiny.
Like yes a nice pair of boots costs more and you do get more value out of them compared to Amazon basics boots.. but far more people end up buying the cheap option because it's cheap and available.
My town has a bunch of half empty new buildings that are keeping their prices high instead of competing on price (they're also garbage construction, so they didn't compete on quality either). Apparently it makes more financial sense to the owner to keep empty units instead of competing because of the value of snagging a few tenants at higher rents or something.
Some regulations are bad. Some regulations are good.
The abundance types do not want to remove good regulations, like structural integrity or fire safety regs.
They want to remove bad regulations, like parking minimums or building height limits.
Please understand this very important distinction.