Actually, according to my inflation calculator, 60 cents (the price of the full dinner) in 1941 is equivalent to $12.42 in today's money. That's pretty impressive, because you'd be hard-pressed to find a dinner for $12-$13 today even off the rails. (By the way, the quoted one-way coach fare CHI - LA of $39.50 is equivalent to $811 in today's money, the "Tourist Pullman" fare of $49.50 is equivalent to $1,016 in 2023 dollars. )
It's hard to compare exactly what these price differences mean. What did a full dinner cost in a mass-market restaurant in 1941? What were median and average salaries/wages like back then?
Well, here's an example from the era:
https://i.pinimg.com/originals/a7/79/58/a77958ccf61664be94fd9970a3626986.jpg
Looks like entrees were in the 40-60 cent range, a full dinner could be easily a dollar. Steaks were about 90 cents. A dollar back in 1941 was the equivalent of 20 dollars today, so, in general, I think perhaps restaurant meals were cheaper back in the 1940s than they are today. By the way, if one can get a time machine, please go back and visit the Warner Bors. Studio Cafe and order some Sauerkraut Juice for 15 cents and tell me what it's like. I guess peoples' taste has changed over the years.
It's possible the Warner Bros. Studio Cafe had subsidized prices for studio employees. Here's a menu from the famous Brown Derby Restuarant from 1941:
https://i0.wp.com/www.martinturnbul...017/01/Brown-Derby-menu-19.jpg?resize=640,422
Full meal prices were closer to $2 (or $40 in today's money.) A porterhouse steak was $3, or $60.
So the Amtrak prices don't seem out of whack with restaurant meals -- what's more interesting is how Fred Harvey managed to serve a full meal for 60 cents (or $12). Of course, there were only 2 dinner entrees, fish and chicken.