Many thanks to Jan von Hein for flagging the ultimate judgment (the link is to a press release) of the Bundesarbeitsgericht in Nikiforidis. I had of course reported earlier my serious misgivings about the CJEU’s judgment in same, upon preliminary review.
The judgment eventually declined to employ the opening left by the CJEU, to take Greek law into account ‘as a matter of fact’. Thank you, but no thank you: there was no suitable point of entry in German law to take account of the Greek austerity laws. Still, as Jan points out, the judgment in Luxembourg undoubtedly will feature as precedent in future cases.