The imaginative ideas of paradise earth originated with the illustrators at Bethel, not the writers. As they produced their pen and ink, then oil on canvas fantasies, each became more far-fetched than the previous. I can honestly say that they were the driving force behind the teaching. The writers were often amazed when they saw the dream-scape creations that accompanied their articles. Of course the readers assumed that the WTC had received the inspiration directly from God.
In this Chicken/Egg scenario, the illustrators came before the teachings.