I just want to point out that apart from the effect on physical health, poverty also can cause mental health issues. A lot of the clients we see can't afford medication, as was mentioned, but poverty adds to their depression.
I was at a CPP disability appeal this morning, and my client had fibromyalgia, DDD, all kinds of illnesses, and she can't afford to pay for the painkillers. She's used Chinese medicine; she burns her skin to stop the pain, and she is completely scarred. She has asked the doctor for medication to kill herself.
The lack of good physical health can sometimes lead to mental health issues as well. And of course, there are also studies that show that racism is a factor in mental health. So all of these issues have to be looked at as well.