Don't Panic?

I'm not really sure how much wisdom, as opposed to humor, is embedded in this quote from [guess], but sometimes I think it's quite a lot:

This planet has, or had, a problem, which was this. Most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movements of small, green pieces of paper, which is odd, because on the whole, it wasn't the small, green pieces of paper which were unhappy.