Edit, reply to Lukan as I am rate limited with my comments: I’m sure that those people you saw in Leipzig and Berlin are global 5% earners, maybe even 1%-ers. That is a very luxurious lifestyle that not many can achieve.
Edit 2, again to Lukan. My point still stands that the Germany lifestyle is very luxurious compared to the rest of the world. And even in Germany, you need a decent income if you want to live in a high density city.