But that's exactly the point, Gregor. Any concerned dub would wonder how things would happen in the New System TM , but the old standby like you said is "Jah will provide." Therefore any problem or concern can be explained away without a second thought. So any question about rotting corpses, or how or where to clean up buildings, is replaced by "Jah will provide." No thought needed, no logic required. Much like WTS doctrine anyway, eh?
It is also implied that, much like the pictures, we would return to an agrarian existence. I figured we would live like the Amish. So there's no need for electricity, the outhouse becomes the sanitation, and there's no need for phones because there would be an eternity to spend visiting people.
Funny how humans were supposed to have perfect minds too, yet we would somehow choose to live like 18th century humans...