No,the materialism came from Jeremy's side as attested by several witnesses. At one point in their relationship Julie asked:"Why don't you just walk away?" to which Jeremy replied "because I've got too much to lose". I think with the talk of Nevill being bought out and offered a considerable sum for White House Farm Jeremy didn't want his father having even more control,and he decided to cut and run.
Those words you have, so often repeated, may have less to do with materialism than simple statement of fact. Jeremy may well have been instructed at some stage, as was I, that if he followed the proscribed road and chose to make farming his life, he would inherit lock, stock and barrel. FACT. Whilst nobody is suggesting that, under other circumstances, he would have chosen to farm, there were numerous compensations. Superficially, unlike Julie, Jeremy had it all. It was Julie who was materialistic. Julie wanted what Jeremy had. Julie determined to be young Mrs Bamber. If later pictures of her are to be believed, Julie wanted to display to the world, that she too, had what Jeremy had. Not walking away "because I've got to much to lose" says much more of Julie's position than Jeremy's.