Centaurus:
The Turkish Airlines accident is a classic example where the crew apparently just watched in disbelief at what was occuring in front of their noses - and did nothing...
Fail safe.
A CABIN ALT warning caption is unambiguous and hard to ignore when coupled with flashing red warning captions and the engineering easy enough to implement. Similarly, the convenience item of having the AT command idle at 27' RA shouldn't lead to a situation where the AT will snatch power back to idle due to an otherwise insignificant failure of the RA, when the pilot has manually commanded max thrust while attempting to recover from an inadvertent stall. The Airbus RETARD call design is a much simpler and elegant implementation of the KISS principal, which allows the pilot to determine if actually retarding the throttles is the right call in a particular instance. In both these accidents there is no getting away from the fact that better design implementation by the aircraft manufacturer would likely have allowed the passengers to survive their encounters with an inadequate crew.
Regards.