It’s super lovely that Berlin has a lab which does these kind of user tested innovations on city processes. The work that needs to be done is written up here and it’s relatively straight-forward (there are just no short-cuts).
One state, BW, in Germany took the opportunity with the reform of the property taxes to implement something like a Land Value Tax (at a very moderate 1.3‰ rate) and it is doing exactly what it should be doing.
It is beyond funny that the right wing conspiracy theorists have latched onto the idea of creating liveable, walkable cities as the next threat to humanity.