I haven't found an intersection of mental illness and decaying society yet. They touch here and there, but never as a significant point in any of my writing. If I try to consciously pull the two together, I'll have to reread a lot of my Phillip K Dick library to see how the master did it.
In general though, I love soft science fiction in the lineage of Dick and Heinlein. Inspirations on top of that are Alan Moore and Lovecraft. I enjoy the questions that science fiction can raise about us as humans more than the how things work found in hard sci fi, like Asimov or Herbert.
I'll get on the FAQs as quickly as I can.