I know it's the title of the article but I still would rename it to "Germany...".
Berlin is a city state in Germany with is own local government.
Berlin is a city state in Germany with is own local government.
Germans will know that Berlin city doesn't have this kind of money lying around ;)
The reasons for this are many fold, including that the Berlin government is pretty bad and as such the city has monetary and other problem all the time.
Also in difference to e.g. the US the capital city has not the same kind of special position, besides some small area in it the rest of it is fully self governed by the city state in the same way e.g. Bavaria is self governed by it's local government.
More info can be found here: https://en.wikipedia.org/wiki/Metonymy