Your last paragraph is how it works in Switzerland. There are no checks when entering busses, trams and trains. Busdrivers in cities will usually not let you pa

Your last paragraph is how it works in Switzerland. There are no checks when entering busses, trams and trains. Busdrivers in cities will usually not let you pay with them but sent you to the ticket machine placed in the middle of the bus. They do send controllers "randomly" to check whether people have valid rides and hand out quite hefty fines if not. So far I have only ever heard the transportation companies complaining loudly about not being able to collect fines from some people, rather than fare dodging itself being considered a big problem.