Thank you for the question.
The problem that this particular “solution” addresses is a system-level problem with creating parallel correctional mental health services with other community-based services. Who pays for it? Who's responsible for it? This solution places the onus and responsibility on health for addressing prisoners' mental health and addictions issues.
Inmate mental health and addictions is a community health problem. It's a public health problem, and I think this innovative model not only shifts the direction, authority, and responsibility towards those who are fully capable of providing the service but also it allows for an expansion of the continuity of care for people who manage the rest of the system. So it's a system-level innovation in terms of how to manage and fund prison-based mental health services.
Specifically, I wouldn't know what you should be attending to, and I'm very happy to hear that you're travelling there to hear their experiences. I know it's a fairly recent thing, so they might be going through some growing pains. I look forward to reading about what you find.