The Prodigal Son

[Wyrd of Gawd]

It sounds like an allegory that's supposed to be teaching some sort of lesson. I'm not really sure what the lesson is meant to be.

Something about forgiveness? Fairness?

It's the same story as the squirrel who saved his nuts vs the one who didn't who then scrounged off the squirrel who saved all his nuts.
The stories are responsible for a lot of people going on unemployment benefit (just kidding, and I stole that joke from Ricky Gervais)  The lesson is basically, mess around, squander your money, some family member or do gooder is bound to pick up the pieces.

The Esau & Jacob and the prodigal son stories show that you can't trust your brother; he will steal your stuff and try to turn your father against you.