Why the Pipeline Fills So Slowly
The trades cannot be manufactured on demand, and the mechanism is specific: a journeyman is the output of a four- to five-year training clock, and apprentices can only be trained by working journeymen at a bounded ratio, so the system can widen only as fast as the current workforce absorbs newcomers. Layer an aging workforce and a physical retirement wave on top, and the near-term supply curve is nearly vertical. Push demand against it and you buy wages, travel, and overtime, not workers. Rising apprentice enrollment is genuine and it matters, but it pays out on a decade scale. The people who will build the early twenty-thirties are already alive and already in the pipeline; that number is forecastable today, and it is not expandable.
Knowledge check
Why can't a surge in demand simply pull more apprentices into the trades fast enough to close a shortage?
Show the answer
Because training capacity is bounded by the existing workforce: apprentices must be supervised by working journeymen at a limited ratio, and a journeyman takes four to five years of accumulated hours plus coursework to produce. The pipeline can only widen as fast as current journeymen can absorb and mentor newcomers, so the short-run supply curve is nearly vertical and extra demand converts into higher wages, travel, and overtime rather than more qualified workers.