It can be considered correct in casual speech because once something is common, we really can’t call it incorrect
Well, yes. That's generally what I meant. I'm basing it off of the Merriam-Webster definition
https://www.merriam-webster.com/words-at-play/fewer-vs-less
For the most part, in common usage, the two have become unfortunate synonyms, like literally and figuratively have (ugh).
Because once a corporation increases prices due to "supply and demand" or whatever bullshit reason they make up that week, those prices never go back down if the reason changes. conveniently.
Every corporation will say "we need to increase the price on "x" because the primary supplier in Bolivia is facing economic turmoil...blah blah blah." But once that turmoil is over and supply returns to normal, they don't bother taking the prices back down and rely on the fact that modern society is too distracted by their "conveniences" to care.
They (the super-rich) have created a class of people beneath them who don't notice or care that they're being fucked over so long as they are provided with more and more vapid content to consume.