If you remove the fare collection infrastructure, you remove beneficial usage tracking infrastructure too.
There might also be other "social engineering" benefits to having a fixed symbolic charge, as some people argued in this thread. I don't know about that, but I don't think it's _just_ lobbying.
There might also be other "social engineering" benefits to having a fixed symbolic charge, as some people argued in this thread. I don't know about that, but I don't think it's _just_ lobbying.