Plus at the end of the day however much you pay unless you can reserve a seat (and then not 100%) you aren't guarenteed a seat.
But that's the price of having a flexible, "walk up" train system and by my reckoning it's one worth paying. What would you rather...? Turn up at the booking office, buy a ticket and stand on the train you want to catch, or turn up at the booking office to be told that they can't sell you a ticket because there are no seats on any trains for the next three hours? That's the model used in the US, where virtually all Amtrak intercity trains are fully reserved (they don't allocate you a specific seat, but you are guaranteed one) and it's a massive pain in the backside - you need to reserve ages ahead of time, and the charges if you pitch up at the station and buy on the day are larcenous. I was quoted $70 (more or less GBP45) for a half-hour journey of about 40 miles a few months ago, and this was in the middle of the day on a weekend. Trust me, you don't want the "guaranteed seat" thing applied on
FGW▸ or any other of the
UK▸ TOCs▸ : sounds like a nice, equitable idea but the practicalities mean the current system is
way better.
Airlines are an entirely different kettle of fish - safety rules there require (for obvious reasons) that everyone must have a seat and be belted into it for takeoff, landing and at other times as the captain deems appropriate. Although Ryanair did say they were in discussions with Boeing regarding the design of some kind of restraint that would allow standing passengers on their flights, I suspect like many other things (the infamous toilet charge and the suggestion that one day their flights would be completely free and pay their way by acting as mobile casinos, for example) it's just a publicity stunt. Apart from anything else, have you ever tried standing up underneath the luggage bins in a 737?!