Imagine paying a doctor handsomely for a diagnosis only to have her walk out the door, the moment surgery begins. That, more or less, has been the consulting business model for the better part of a century. We diagnose. We prescribe. We leave. What happens on the operating table has never been contractually our concern. At a certain time, this arrangement made a certain sense. Strategy work was genuinely scarce expertise. Few companies had the analytical horsepower, or the outside vantage point, to see their own blind spots clearly. The economics were clean: bill for hours, judgment, and expertise, not for outcomes you couldn’t fully control anyway. That cleanliness was also the arrangement’s quiet flaw. Economists have a name for it: the principal-agent problem. Whenever the person giving advice doesn’t bear the cost of that advice failing, incentives drift. The consultant is paid for the elegance of the recommendation; the client absorbs the mess of making it real.

For years, clients tolerated this asymmetry because they lacked the information to challenge it. They couldn’t easily tell a strategy built to survive their actual organization from one built to survive the final presentation. That’s changing, and quickly. Increasingly, clients are asking us to stay through the build, sometimes tying fees to milestones that surface in the P&L months after the recommendation. I worked on one transformation where the entire framing shifted, from “Here’s what you should do,” to “Here’s what we’re building together, and here’s how we’ll know it worked.”

Several forces are converging to force this shift. The kind of structured thinking that once justified a premium fee is now something AI tools do competently in minutes, which pushes the value of consulting further downstream, toward the harder, messier work of making things happen. Clients have also become more transparent with each other. Buyers compare notes now in ways they didn’t a decade ago, which erodes the information asymmetry that lets elegant-but-untested strategy pass as rigorous.

What this produces, when it works, is a rare thing: a consultant whose fee depends partly on whether the client actually succeeds. Is this comfortable for consultants? Not particularly. It asks us to trade the safety of the polished exit for the accountability of staying past the applause. But comfort was never really the point of the old model, only its byproduct. What clients are asking for now is closer to what any serious profession should have offered from the start: advice from someone who has to live with it. The firms that treat this as a passing pricing experiment will be the ones left explaining, in five years, why their best people kept leaving for operating roles where the stakes were finally real. The ones that treat it as a genuine shift in what consulting is for, an evolution from selling judgment to sharing consequences, will end up defining the profession’s next chapter.