Kind of an odd article, as sometimes there really are reasonable times for a “promotion” with little/no pay increase.
A lot of manual labor and trades positions require experienced people to be management, supervisors, etc. When you take a promotion in a field like this you might have “more responsibility” but the same pay, and that makes sense. Why? Well - because you’re not fucking breaking your back or manning a line all day. I think most people who have worked one of these jobs sees that as reasonable.
Unfortunately, most journalists and many people making online posts about the topic are people who have really only ever worked behind a computer, or ever worked in a big city - so these articles tend to focus on that kind of “technocrat” job sphere where everyone is just some variation of “computer manager person”