Dick,
And if you rely on the myth that when you now descend in G to Broome that all aircraft on on the correct frequency and listening for your inbound calls (with the correct frequency dialled in and the volume up) you are kidding yourself and your passengers.
So what's the option? For goodness sake, you're running around yelling and screaming but not proposing any solutions that are better than the current setup (I contend they are worse)!
Oh, by the way, correct freq and volume up is easily checked by the VFR using a bit of airmanship and doing a quick check-call with Centre, and when they get to the "vicinity"
of the airfield, talk to the CAGRO (remembering there is a requirement to broadcast at 30nm at BME).