What do you want the companies to do? Have an annual psych eval for pilots?
I'm not an FAA qualified physician, but I was a Captain for a large International U.S. carrier and, as part of that job I had to get a physical every 6 months. As explained to me by several different physicians, part of that exam included a psych evaluation. One of our pilots was flagged by this process and had to undergo further evaluation by the company doctor. He was eventually cleared and I don't remember the exact circumstances, but there is indeed a procedure in place, or at least there used to be. I'm retired now.