 Though Raymond and Martian live in something comparable to a castle, Raymond "turns his nose up to it."  This shows that
Nobody in the neighborhood was surprised when Martin's mother disappeared and Ninian came to take care of him. Besides, if she really was his great-great-grand-daughter, as she said, why would she tell him to call her " Aunt Ninian "? "He's dissatisfied with the current social order and killing you is part of an elaborate plan he's formulated to change it. It wasn't that she cared what these people thought of her, for she made no secret of regarding them as little better than animals, but she was shy of attracting attention. Martin was told to call him Uncle Raymond. From time to time, there were other visitors—Uncles Ives and Bartholomew and Olaf, Aunts Ottillie and Grania and Lalage, and many more—all cousins to one another, he was told, all descendants of his. There were hot water and heat all the time and a freezer well stocked with food—somewhat erratically chosen, for Ninian didn't know much about meals. The non-glass part of the house was of neat, natural-toned wood, with a neat green lawn in front and a neat parti-colored garden in back. Though they were in the house with him, in their minds and in their talk they were living in another world—a world of warmth and peace and plenty where nobody worked, except in the government service or the essential professions. There was no devastation, no war, no unhappiness, none of the concomitants of normal living. It was then that Martin began to realize that either the whole lot of them were insane, or what Ninian had told him at first was the truth. When Martin was sixteen, Raymond took him aside for the talk Ninian had promised five years before. You see, he's an idealist," Raymond explained, pronouncing the last word with distaste. His face was pallid, because he spent little time in the sun, and his speech rather overbred, his mentors from the future having carefully eradicated all current vulgarities. "And Conrad really got upset over the way Earth has been exploiting the not so intelligent life-forms on the other planets," Raymond continued. We're virtually the same people ... although it is amazing what a difference two hundred odd years of progress and polish can make in a species, isn't it?" All that sort of thing comes from the out-system planets. And, on those worlds, it's far cheaper to use native labor than to ship out all that expensive machinery.
 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.