Ah, The Trees. The song makes me think of the Kurt Vonnegut short story "Harrison Bergeron", which presents a world where absolutely social equality is enforced by crippling those with special abilities so they are at the same level as the lowest common denominator. It's essentially a clever retelling of the "tall poppy syndrome", where people want to cut people with more money, talent, better looks, or whatever, down to size. I'm not sure if at the end the maples have arranged to have the oaks literally cut down to size, or if the maples' agitations have led to the whole forest being clear cut, but either way it's a clever jibe at those who nurse resentments and want to bring down those above them in some way.
Digging: Picchio dal Pozzo - Picchio dal Pozzo