I heard a worrying story from a simulator instructor conducting IFR training on overseas cadets. On final the instructor failed the altimeter near the OM. The PF immediately feathered the left engine, then selected gear up, flap up and continued the approach to a wheels up landing. When the PNF asked by the instructor why he did not warn the PF, the reply was "But he is the captain, and you never question the captain's decisions."
Within the next five years both of those cadets will most likely be captains on jet transports.