Since the EASA FTLs were introduced there have been no serious incidents in which fatigue was determined to be a causal factor and so there has been no need . . . yet . . . for the standard politicians' response - 'our thoughts are with the families of the victims and we will set up a full and frank inquiry so that lessons can be learned to make sure a tragedy like this never happens again'.
But even if safety has not yet been compromised, there is another factor that should be considered - the long term detrimental effect on pilots' health of the merciless current FTLs. Perhaps pilot unions can fight the airline accountants on these - valid - grounds.