This is a really stupid idea! There is a 100% chance it would be abused. Where is the benefit to society for this idea? Part of developing young people for the real world is putting them in situations where they can learn to effectively manage stress. You don't get "mental health days" in the real world. This kind of thinking is what precedes the decline in a society. Ideas like this are brought to us by the same kind of short-sighted thinking that created "participation trophies" and the like. It's a horrible idea!