 Though Raymond and Martian live in something comparable to a castle, Raymond "turns his nose up to it."  This shows that
Martin was told to call him Uncle Raymond. "And Conrad really got upset over the way Earth has been exploiting the not so intelligent life-forms on the other planets," Raymond continued. "I'm trying to talk to you as if you were an adult," Raymond said, "but if you will persist in these childish interruptions—" "I'm sorry," Martin said. In that way, there would be no space-drive, and, hence, the Terrestrials would never get to the other planets and oppress the local aborigines. Induced , Martin knew, could have meant anything from blackmail to the use of the iron maiden.
 for the people from the future, regardless of its grandeur, nothing in the past is good enough for them.
 for the people from the future, regardless of its grandeur, nothing in the past is good enough for them.  in the past, class was determined by what you had to show, and in the future, it is based upon who you are as a person.  Materialism doesn't exist in the future.  Raymond's purpose there is to show Martin the finer things life has to offer above any other purpose.  in the future, people have taste, whereas people in Martin's time do not.