There’s a Philip K Dick novel where the decay of Earth has led to the colonization of the solar system, but most people on the colonies are barely surviving in

There’s a Philip K Dick novel where the decay of Earth has led to the colonization of the solar system, but most people on the colonies are barely surviving in hostile living conditions. Their main form of entertainment is to do drugs that allow them to group hallucinate and insert themselves into their Barbie play sets.