Alternate Universe: Amon receives his abilities from Vaatu
“Since the beginning of time,the spirits have acted as guardians of our world, and they have spoken to me. They say the Avatar has failed humanity. That is why the spirits have chosen me to usher in anew era of balance. They have granted me a power that will make Equality a reality.”
Equalizing the population, along with the Avatar, would have given Vaatu a better chance at defeating Raava during Harmonic Convergence. Also destroying Korra’s connection before equalizing her may have served as harsher consequence.