It's just that everyone talks about the Swans and Moneyball, but the key element of Moneyball is that the Athletics had less money than their competitors, Sydney have more money!
They use the excuse of cost of living but on a world scale Sydney ranks 11th and Melbourne 15th, hardly justifies and extra 10% salary cap. By the way, Adelaide ranks 27th therefore they should have a smaller salary cap by Sydney's reasoning.
I do admire the culture and strong team environment the Swans have, but the draft and salary cap are the two single most important elements of the competition and Sydney's concessions completely undermine this.