Maybe when he first started on the way back, the Reds (or whoever) said he could only carry $20.. Maybe since that worked out so well, Josh chooses to do it on his own free will. This could apply to some other stuff too. Maybe Josh is so scared that he will relapse that he wants these extreme measures. It looks like Josh's life is very structured now. Perhaps he likes that (some people do). Maybe if Narron was cut loose, he'd stay clean, or maybe not.. Looks like Josh doesn't want to risk it.