> If you can figure out how to achieve the same results with fewer layers of management, or have your management act more efficiently, you'll reap the rewards. So any bullshit managerial position is inherently unstable: as soon as one company figures out they can do without it, it'll vanish from the industry.

If you can implement it. Building a large company, or redoing management structure in such, is a very long process requiring buy-in from many people. People, whose personal interests may oppose your goal of eliminating inefficiencies.

My guess is that most "low-hanging fruits" in management styles already got picked, and what remains are the cases where it's actually very hard to build (and maintain) a bullshit-free system.

> We're at pretty close to full employment, which suggests there's plenty of genuine work to be done.

Not if some significant chunk of those jobs are bullshit. Just because a job is bullshit, doesn't mean it won't make you - and your employer - money.