But the truth is that you are in an extremely heavy, expensive, and slow vehicle that requires over 1000 man-hours to carry fewer than 300 seats the whole length of the ride. That doesn't account for the capital costs of the vehicle or maintenance on the route, or overhead for the stations.
Loosening regulations to reduce the staff, making the train itself go faster (if possible), and allowing for lower cost and lighter weight cars (possibly to include the much denser sleeping cars found on Chinese and Swedish railroads) would change the economics from 'taxpayer subsidized cruise' to 'reasonable form of luxury transit'