I have vanishingly little experience, but I don't think there's a strong correlation between the cost of a medicine or treatment and its effect on health outcom

I have vanishingly little experience, but I don't think there's a strong correlation between the cost of a medicine or treatment and its effect on health outcomes. I think it's more of a function of how rare, difficult, new (not generic or out of patent), or experimental it is. I can see going for a more costly treatment seeming more appealing psychologically though.