I would have to agree with the disparaging comments above about YSSY. The curfew is the modern day equivalent of the destructive union tactics that crippled Australian industry for forty years. It simply must go.
Added to Sydney airport's woes is the attitude that seems to permeate Australian ATC, who carry on as if THEY are the end user, rather than the service provider.
Every time I fly into Australia, I'm reminded of the story of the retiring United pilot who told Sydney ATC that they were the second best ATC in the world.
Everyone's heard the punch line, so I won't repeat it here.