Shaun discovers a new philosophy, one that surely millions before him have posited, but now Shaun has discovered it, so it I guess it matters. Jon certainly thinks it matters. What is the "philosophy?" you ask. Well, see the title? That's it. Shaun goes down the path of exploring what the situation of the world is, and posits that the reality of the world is that young people owe nothing to older people. Empirically, this is dubious as the actual existence of the young generation depends upon an older generation generating them. However, Shaun seems to be exploring this from the standpoint of expecting the youth to learn certain things.

In short, Shaun essentially argues that there is no such thing as wisdom, but by the end of the episode, he's on his soapbox dispensing wisdom in a most cavalier fashion!