We're all riding the rails together regardless of how well off we may or not be. I am no better or worse than any other pax on any trains I ride.
The issue, I think, is that you and I may see it like that, but there is a select group of passengers who
do think they are better than you or I or the college student who is just trying to economically get from Point A to Point B.
Part of the reason I love Amtrak is for the egalitarian experience. I can have breakfast with a retired college professor from U of Mich, and lunch with a student from Schenectady, then dinner with an Amish farmer and a retired couple from New Zealand. All of us are generally dressed the same and lose our balance the same when the train hits a particularly rough portion of the track. There are no curtains which separate the Beautiful People from the riff-raff, no gourmet meals served with premium wines which are simply unavailable to those who are not sitting in the section with 2 x 2 seating. Everyone on Amtrak eats the same food (or not) and gets the same service (and food) in the cafe car.
However, with many of the rail tour groups there is an expectation that they
should be treated better than the average passenger. Whether it's because they paid X amount or because they think they are in a select class (ie, group) which is better than those who aren't, or some other reason, the entitlement is there nonetheless. This creates issues for the OBS staff as well as for those who are not in the group. I get as tired hearing the LSA reiterate, before every meal service, what community seating is and why everyone, no matter who they are, needs to participate as I do hearing the repetitive conductor announcements about the necessity of wearing footwear while on board. (You're in a public space, shared with other members of the public---now act like it.)
While the derisive comments about the tour groups here may seem snobbish or an example of the very thing they criticize, I see them as expressions of frustration over the violation of the very spirit of egalitarianism I mentioned earlier. Yes, there are boors and insufferables in every segment of society, but the ones in the subject of this thread seem to be more noticeable when observed by those on the outside of the group, as well as enabled in their behavior by the company whose service they barely seem to be able to tolerate. This is what creates tensions as expressed in this and other threads and why some, myself included, would just as soon prefer that they receive their wish and be separated from the average traveler---be that the semi-retired couple taking the train to their cruise departure point or the of little means college student going to or from school.