To put it simply: Poetic Justice.
It brings light to "real world" indignities, the apathy of power and greed, while highlighting the internal battle of survival instincts versus emotional recognition. Moving pieces of deflection ultimately causing the viewer (hopefully) an intense case of reflection.
This movie is a work of art, not for the faint of heart but an example of the heart of sacrifice. Watch it and hopefully you will do what I imagine was intended....feel viscerally and question past, present, future and all it encompasses.