Well... I suspect German Datensparsamkeit is only a figment of the utterly ridiculous digital infrastructure of the german governments, both federal and state ones. Most processes are still carried out via paper or fax (fax!), you have to show up personally for the most insignificant things, every single village has their own records (practically never digital), and every time the government attempts to make a stab towards more digitalisation, big corps waste billions on giant projects that never get finished - we had the attempt to get health insurance (mandatory here) cards with an NFC chip on them that would securely store medical records and grant online access to your data; finally, no more carrying X-Ray CDs from MD to MD or filling out registration forms at the doc. But of course, 10 years later, everyone has a new card, but you can't do anything with it. Someone has earned a lot with it though.

So, all in all, it's not that Germany's government is so privacy conscious, but we're simply stuck in a pre-digital world with no reasonable way to share data.

In my (university IT) circles it is definitely part of the lived culture. IT sees itself as the ally of the users and not a data collector for the management. The management mostly agrees with the principle of data scarcity as well.

I recall one instance where the highest person at a university tried to get all the user's contact tracing data because of some incident (theft), IT explained that their request was not only illegal, but also useless, because the way data was stored would not allow to extract data without going to another official place and requesting the other half of the data which could only be accessed by the health department.

There is a german saying that goes a bit like: "where there is a feeding trough there are pigs". The idea of data scarcity is to avoid putting up things that can be used as food by pigs. So instead of defending data silos, you build them in a way that they don't become targets in the first place because they are of limited use outside of the intended use case.

Judging by the number of politicians complaining about data privacy, it works.