That's a great question. In terms of adequate and suitable service, I'll speak as a shipper. That's what I am. There are a multitude of ways in which a railway can ensure that it's profitable, whether through negotiating an agreement with a shipper such as me or issuing a tariff.
To me, “adequate and suitable” means that my goods will move through to their destination. It's not a debate about if, but about when. We cannot entertain any discussion about whether our goods will move. They must move. The common carrier obligation also dovetails into adequate and suitable service. The railways have an obligation to move our goods. It can't be a debate about if; it has to be a discussion about when.