Oh, these things are definitely interconnected. The War On Drugs was started mainly for racist/political reasons. Nixon couldn’t say “let’s arrest all the black Civil Rights leaders,” but if he could find a drug that black people tended to use (either for real or stereotypically used), he could arrest them for drug possession/use and disrupt those troublesome groups.
And many mental health issues can have their root in money issues. To give myself as an example, I’ve recently been feeling a ton of anxiety over my job. I know I’m talented, but I’m plagued by self doubt and worry about being let go and needing to find a new job. At 48 years old and with a family to support, this can be a lot of pressure. The pressure increases my anxiety and which stresses me out in a feedback loop. Perhaps I could benefit from therapy, but that costs money which then gets added to my financial woes. So I’m stuck with “dealing with it” as best I can. Yay capitalism?