The “economic method” Monika Schnitzer has known as on politicians to reform pensions. Schnitzer advised the German Press Agency: “We cannot afford to simply let pensions continue to rise as they have been.” Schnitzer didn’t specify the pension at 63 exactly.
https://www.welt.de/wirtschaft/video251600476/Monika-Schnitzer-Koennen-die-Renten-nicht-weiter-so-steigen-lassen-Wirtschaftsweise-fordert-Reform.html