Is there a "moral-index" of fables?

Question

There is a motif-index for folk-literature composed by Stith Thompson. I wonder if there is a similar index regrouping fables by the moral they convey? As a rough example

• G. Blinded by greed
  • G.1. "The labours of others it is often another who profits''
    • Aesop's The Lion, the Bear and the Fox
  • G.2. "The preservation instinct lost in front of profits''
    • Zhuangzi's The mantis stalks the cicada, unaware of the magpie behind

EDIT: I'm indeed looking for a scholarly index, but other relevant sources are welcomed.