There is a vicious, self-reinforcing cycle of poverty associated with mental illness. You become poor. Sometimes through circumstances well beyond your control, such as losing your job, or perhaps because of a pre-existing mental illness or health concerns.
So you seek out government assistance to help you through the tough times.
But living in poverty for any significant length of time increases all sorts of risk factors for health and mental health problems. You are more stressed, worrying about money constantly, and how you’re going to pay the bills or have enough money to eat. You eat worse because bad, processed food is so often cheaper than nutritional food. If you can still afford to live on your own, you will likely do so in a neighborhood more prone to violence, exposing you to more trauma and risk for personal violence.
It’s a vicious circle where both poverty seems linked to greater rates of mental illness, and in some cases, certain kinds of mental illness seem linked to a greater likelihood of living in poverty.