I was watching some British crime drama, and as the police were investigating some murder in the world of fashion, we learn of some junkie friend who was staying with some of the suspects and the victim at different times, and the guy stole things and such for drugs. And then it hit me: that would be a great cure for hoarders! Plus, it would give junkies somewhere to live and a function to serve in society.
So for someone with a hoarding problem, just have a junkie come live with them, and pretty soon the junkie will start to steal things to sell or pawn for drugs, and little by little the house will become manageable, with more and more stuff disappearing all the time. And if the hoarder starts filling up the house again, they could just ask for the junkie to come back.
And in this way, two different people with two different problems can help each other.
(Hey, maybe it could become a government program of renewable resource management.)