Every boardroom I sit in treats a Gartner forecast as a roadmap. In October 2024, Gartner predicted that by the end of 2026, 20% of organizations would use AI to flatten their structures and eliminate more than half of their middle-management roles. Two years on, we call it the "Great Flattening" and celebrate it as efficiency. I think we misread the chart — that forecast was a warning, not a to-do list.

The layer does two jobs; we only priced one

Middle management has always welded two things together: a routing layer (synthesizing updates, chasing status, drafting reports) and a development layer (coaching, resolving conflict, grooming successors). AI genuinely absorbs the first. It cannot do the second. Cut the layer and you don't just remove routing — you remove the apprenticeship that produces your next directors and VPs.

The numbers already point the wrong way

Gallup's span-of-control data shows the average manager went from 10.9 direct reports in 2024 to 12.1 in 2025 — up from 8.2 in 2013. A manager overseeing a dozen people isn't coaching anyone; they're a spreadsheet administrator. Middle managers were nearly a third of all layoffs in 2023, and postings for the role have dropped more than 40% since 2022. That isn't trimming fat. It's sawing off the rungs of the ladder.

The irony we keep ignoring

Gallup's 2026 State of the Global Workplace found manager engagement collapsed from 31% in 2022 to 22% in 2025 — and for the first time, managers are no longer more engaged than their teams. We're cutting and overloading the exact layer that moves engagement, then blaming culture or remote work for the decline.

The takeaway

Flattening is a balance-sheet decision wearing an efficiency costume. You can defer leadership development for a few quarters and bank the margin. But when your 12-report managers burn out or quit, the bench will be empty — because you removed every rung beneath them. Before you cut the next layer, ask who is developing your next leaders. If the answer is "nobody," you haven't saved a cost. You've borrowed it at interest.