We're lucky here. Our inspector backs us up by stopping any further work on jobs when
unqualified workers either get caught or turned in for doing wiring. If they don't comply, he will (and has done many times) order a disconnect of the power until a certified contractor takes responsibility for it.
The public needs more education as to who can or cannot legally do wiring and how to check their qualifications. Unfortunately there are far too many people who will intentionally sacrifice safety in order to save a buck. There are just as many others who will, out of ignorance, hire someone who has deceptively advertised their credentials.
