Sorry, it was badly phrased. A concrete hypothetical example, A=Birmingham, B=Newcastle, C=Edinburgh, X=Virgin, Y=CrossCountry. CrossCountry trains might decide to undercut Virgin on the Birmingham-Edinburgh flow, advanced fares at £10 with Crosscountry, £50 with Virgin), but keep advance tickets more expensive on the Birmingham-Newcastle flow (say, £80).
Yes, I see what you mean now.
If we allow stopping short, CrossCountry will put up their Birmingham-Edinburgh prices, loosing some customers to Virgin trains. They might decide to change both Birmingham flows to £40, thus still undercutting Virgin on the Edinburgh flow, but to a lesser extent. Overall, the railways gain revenue, even if CrossCountry lose.
The dynamics may be difficult to model, since those people who travelled on £10 tickets may not return at all now that the price has gone up substantially, so the railway on the whole may lose. Nevertheless as I said in an earlier post, this can be difficult to predict so striking the balance may take a substantial amount of time.
I can see how people can have both opinions. If one sees the railways as selling a service of transporting you from A to B, then not stopping short makes complete sense, when a ToC tries to maximize revenue. It also makes sense that with ToCs competing, this might not maximize revenue for the railways overall. I currently sit on the fence slightly, but do feel that some current pricing feels 'unfair'.
This is certainly one way to understand the system, and one I am happy to agree with. To those people that lose out on the cheap deals, it certainly can be perceived as being "unfair".
By that logic the TOC should be sending me a bill for £76 if I decide to stop at home, or if I decide to get a lift instead, or if I miss the train because I spent too long fannying around in Harrods.
If you consider a ticket as buying you a seat for a particular distance, then yes that would be a logical conclusion.
I'm still waiting for someone to explain to me how stopping short by getting off half way is different to stopping short by never getting on the train in the first place. In both instances I've not occupied the seat I've paid for and "prevented" someone else buying it.
Look at it from another perspective. You have paid for a service - to be transported from A to B. If you do not use that service, then it is understandable that there is no penalty. If you use the service going from A to B, then you have used what you paid for, so that is also fine.
However if you use a service going from A to C, then that is not a service you paid for. You paid for a service from A to B, not to C, so you have not paid for the service you used.
Unlike some people, I don't believe that there is a right or wrong between the two interpretations, just pointing out that you can reach different conclusions depending on the angle from which you approach the question, both of which are logical.
Oh I see, there isn't one as far as I know.
There can be. See above.
Then revise the fares upwards.
I am not sure that I would be too happy with that, but I am inclined to agree that selected fares on the network do certainly have some "upward mobility" potential.
Overhaul the advance fare system. Set the prices so ending the journey (Not BoJ - once you get off, your journey ends, wherever you are) makes no real odds to anyone and is therefore permissable.
That is certainly one way to put this argument to bed.