IMO it is a lose-lose situation, don't raise the cap by much and people whinge that the players aren't paid enough, blah blah blah. but raise it too much or get rid of it (as some people suggest) and it will turn in the the EPL and only 2 or 3 clubs (probably the Broncos, Bulldogs and Roosters) will have any chance of winning the premiership, so people will complain about that.
the only way you could sustain a much higher cap is to have 10-12 teams with the cuts coming from the Sydney market, and that wont happen because the same people whinging that the players aren't paid enough will be the same people whinging that teams are being cut from the comp.