Something I saw in my own family (I have a family member who is a recovering addict) and in literally every single episode of Intervention is that THE prerequisite to recovery is to stop enabling the addict. Many (most?) addictions are only possible because an enabler prevents the outside world from acting as a forcing function on the addict. So typically this would be a parent who provides food, shelter, money, etc. Once an addict has to provide those things for themselves, it starts a cycle that results in sobriety. Of course, this doesn't always work and the people who it doesn't work for are often the people you see living on the street. But this has been the process for every recovering addict I know and my addict-in-recovery family member says the same about every recovering addict they know (a lot).

It doesn't sound like your brother is exactly an addict (although maybe...), but this snippet sure sounds like he has an enabler in his life (emphasis mine):

> no job, no interest in work, no interest in getting out of the house