Crazy... the beer price used to be set based on average beer prices downtown. Not anymore, I guess:

Augustiner still sells a maß for 9€ in downtown... https://www.augustiner-klosterwirt.d...arte/getraenke
Hofbräu is 10.80 : https://www.hofbraeukeller.de/speisekarte
The O'fest Museum which is operated by the brewery association sells a maß for 7.80: https://www.museumsstueberl.com/Getraenke-und-Speisen/