Comment by swiftcoder

> Another great example are the “open air” transit systems in Germany, Poland, etc. where you can freely enter trams and buses, with inspectors patrolling infrequently to check if you bought a ticket. That kind of system would absolutely never work in America

This is exactly how Seattle's light rail worked for years. You could just walk on and off, and I saw an inspector maybe 1-in-10 trips at best