Another point for consideration.
An airline is not a monolithic block formed of like-minded people marching in step. It is formed of individuals, and there is a spectrum. Even the most respectable airline that has its employees requested in no uncertain terms to operate by the book and in case of doubt make the safe call without thinking about costs must have some people in it that do so only grudgingly and like to cut a corner or two when nobody is watching. Also in some shoddy outfits, there are surely people who value their integrity and possibly their life too high to have them bowto the commercial pressure applied to them, and work to the rules or in absence of proper ones, apply common sense and operational prudence.
Operational oversight by authorities can only go so far. Adherence to rules, sensible operation of aircraft and the refusal to take unnecessary risks (for there are some inherent ones involved in aviation) are not primarily a result of sufficient regulatory and supervisory pressure applied by anyone, but they all come from within each individual, be his workplace ground or air, be it cabin or cockpit, involved in the system.