The two countries that come to mind that have at least made headway and where the outcomes show the effectiveness of their interventions, I would say are Australia and the United Kingdom. The United Kingdom took a national approach to implementing enhanced access to a psychological treatments program that involved psychologists and other kinds of service providers to deliver care. The care is evaluated; the training is systematic, and the outcomes guide their development. They started with depression and anxiety, because those are the problems most likely to affect most people who have them, and then they scaled it up. I believe they're also now going to be offering similar programs to children and youth, as well as to those living with chronic disease.
Australia took another approach. Rather than investing in programs, they decided to invest in more providers. There are two first-line interventions for mental health. There are medications—and we don't have a pharmacare program. There are also psychotherapies, and we don't cover the services of the majority of providers who are delivering those. There are physicians who do psychotherapy, but there are a lot more psychologists, social workers, and counsellors.
That's the challenge: the interventions we need to address mental health problems in our current system are not funded.