Poor but sexy Berlin has only 3 zones despite being well over twice the population of Munich, the city gets by with a much smaller set of zones. Not to mention monthly tickets that can start any day of the month. To get to the airport in Munich you need a 10 euro day card. In Berlin a 2,80 A B A ticket. The more precarious and itinerant population seems to manifest in the fare system. Obviously, a system of fares intended to cover provisioning costs would not. Fares are a political, not economic consideration.