This has been an on-going debate for many years.
In Australia the crew to passenger ratio has been set at 1:36 but in many parts of the world, the ratio is set at 1:50.
Since airlines such as DJ and JQ have come into play, they have argued that they need an exception to the Australian ratio to be able to operate a true LCC business model.
There are many differing opions on this. Personally, I think it should come down to the aircraft type in question.