First and foremost: From kindergarten on, students spend thousands of hours studying subjects irrelevant to the modern labor market. Why do English classes focus on literature and poetry instead of business and technical writing? Why do advanced-math classes bother with proofs almost no student can follow? When will the typical student use history? Trigonometry? Art? Music? Physics? Latin? The class clown who snarks “What does this have to do with real life?” is onto something.

The disconnect between college curricula and the job market has a banal explanation: Educators teach what they know—and most have as little firsthand knowledge of the modern workplace as I do. Yet this merely complicates the puzzle. If schools aim to boost students’ future income by teaching job skills, why do they entrust students’ education to people so detached from the real world? Because, despite the chasm between what students learn and what workers do, academic success is a strong signal of worker productivity.