Much easier to detect a pilot for a blood alcohol level that is one quarter that for driving, (in the U.K.!) than to test them for fatigue, which is likely to have a dramatically greater effect on their performance! Wonder why the airlines don't want any 'random testing' of fatigue???? A much greater threat IMVHO, and one that EASA have just increased exponentially!!!
This is little more than window dressing from the authorities, (much like 'two on the flight deck') as a knee jerk reaction to the embarrassment of being caught out by Lubitz.
Cynical? Moi??