A popular joke proclaims that one in four Americans has a mental illness. The joke tells you to examine the mental health of three of your friends, and if they're all okay, then you're the crazy one.
All jokes aside, one in four Americans really do have a mental illness, most commonly depression. Although a recent article proclaims that depression does serve an advantage in the wild, it is bad for both the sufferer and their productivity. It's hard to get stuff done when you're a moping, exhausted, joyless sack of unhappy.
There are psychological treatments. One can talk about your problem, or try various medications, but they're not free. I propose a fund that would allow people in need to see psychologists -- the national productivity would improve if people had fewer problems.