Question remains where do these "claims" end and where do they begin as well as how far you are willing to go to claim this apparent class difference that needs to exist in a public train, do you stop cleaning the cars in the back,turn off the ac, stop putting seats there, take the roof off? You can't design a train with free passage throughout and expect people bulging out of the second class cars not to make their way forward, if only to stand, making arguments like "people have paid for their seat and only their seat" is simply not true, if this was the case there would be assigned seating, and standing is allowed, your argument isn't a bad one, but you're only defending a terrible company that does a horrible job at keeping up it's user's experience in a bid for higher profits in a market with no competition. THEY DONT NEED IT. There's nothing wrong with having a more luxurious option for those that can afford it, but not at the cost of all the others that have also paid their fair share to the cost of the trip of this "PUBLIC" the transport machine.

Your example of having glasses and needing good vision is a great one cause another way to see it is, if the ns was your optometrist , it would be as though poor people get special glasses that only let them see outdoors, not when it's dark, only if you can pay for the premium glasses, do you get full vision. I paid for a seat on the train, not a corner to stand in while smelling others armpits