1. The tax is being paid with humans. They consider us a food product, like we consider cows, pigs and chickens. That aspect is being renegotiated by the Guardians who outrank the Draco.
2. She has been changing the structure here.
First, she set up an energetic Dyson sphere to prevent serious solar flares/flashes from doing harm and to bounce off space rocks.
Second, she has been putting teeth into Galactic Law. Enforcing the provisions about sacrifice of sentient beings, nuclear wars, destruction of the environment.
Third, she was given a to-do list to eliminate pecking order slavery in all it's aspects.
I am not privy to all the details, this is as far as I know myself.
Why? Are you wanting to wear the Sword of Damocles yourself?