He'll go get some other friend busted and be back to you with a fist full of money by late afternoon. One junkie can be more effective for counter- movement action than a whole army of CIAs, FBIs, Mafias and WASPs. Keep them loaded and they won't move, no matter what. And he's contagious. Barbiturates are even more subtle.
Downers are just as addictive as junk, but they're cheaper.
There's more barb freaks, but they don't have to be crawling out of their holes for periodic rip-off jaunts so often. Some of them are just weekenders, the rest have gotten to the point that they have to be constantly eating barbs just to maintain. People take barbiturates to get away, but unless they manage to overdose themselves they have to come back eventually. For awhile after they come back down things are even more abrasive than when they left. Downers take you away, then bring you back and push your face into it.