They can't quite reconcile to the fact that injustices are committed everyday in our world, and this truly drives them crazy.
We may not consider ourselves to be wealthy, but are we greedy and do we knowingly or unknowingly perpetuate injustices?
Other lastborns engage in sibling rivalry because of the injustices they think they experience because they are the youngest.
After all, the world is full of ugly injustices, and if Libra's house is not beautiful, where is the balance to all that pettiness and greed?
She is not shy about empowering women and speaking out against injustices in the industries she's involved in directly.