" .. especially alarming are the high rates of suicide among Indigenous people. Canada’s Mental Health Commission maintains that the system is sorely underfunded, resulting in annual losses of $50-billion in productivity. Individuals with mental disorders are more likely to live on the margins, compounding conditions of illness and disability,."

" the system is sorely underfunded " ....
Of course it is - so more money is the answer  .-(
Or NOT !
Never mind the FN and reserve issues which in a sense have nothing to do with mental health fundamentals but are a matter of political intransigence.
And there will always be a small segment of the population who for medical or competency reasons cannot look after themselves no matter how much money is expended.
And correlation is NOT equivalent to causation.
And our penchant for politically correct social engineering may be raising a generation of snowflakes unable to deal with reality, or temporary failure.
Try again ......