Think about it, it’d be crazy if there wasn’t some flexibility.
Nothing crazy about it all. If someone can command a €75k job in priv sector they are unlikely to be hunting for a similar position in pub sec for €48k.
On the other hand, if they used to command a €75k wage but now, for whatever reason, are no longer able to (say unemployed) then €48k with prospect of salary returning to higher levels in future, increment or on promotion, would surely be an option to consider.