[asciihacker]

    > I'd bet it's inversely proportional to the number of things we have available to worry about.

When I was financially free I almost went crazy from lack of stress.

[fapjacks]

This is actually one of the roots of PTSD. A switch is turned on that can't be turned off, and it puts you in the strange situation of wishing you were back in the stressful situations of combat.