Sigh...
The issue is not about rich clubs "subsidising" poor clubs.
rich clubs will always outspend poor clubs in many areas and nobody is suggesting that should change.
The issue is about ensuring some level of "evenness" between the teams, to ensure that all teams and all fans get a decent crack at winning. It doesn't have to be perfect, but without some level of this, lesser teams will keep losing, and then they will lose fans and sponsors, in a downward spiral until they become completely unviable and either fold or go back to the state leagues.
Whilst it may be fair enough to suggest that unviable teams should fold, we have only 8 (9 if we're lucky) and must remember that unfettered "survival of the fittest" will rapidly reduce that to around 3 or 4 teams. Which would be a sorry joke.
Now if you prefer, we could go back to a hard, fast, and enforced salary and points cap. But for that to work it must be set inline with the budget of the poorest club(s). That means no more players like Bogut, Ware, Cotton, Lisch, Randle, etc, etc, and local stalwarts playing for under $100k, and consequently preferring to play in Japan.