Cost conscious airlines versus diligent training and working conditions
In my mind it is unavoidable that airlines will work constantly towards lowest possible cost. They can hardly be blamed for that, as after the de-regulation of air travel and the abolition of state supported airlines, the role of the CEO is to ensure maximum long term return on investment for his shareholders. All other aims to him are secondary, it is simply economics.
This automatically implies government or supra-governmental organizations will need to ensure this normal drive does not affect safety. Safety can never be self regulatory and requires stiff regulation. Not easy.