It was always going to be hard for a new franchise starting up. We all knew the quality would be higher if we stuck with 4 teams but having the extra foreigners to help Melbourne start up made sense and it helped the other teams from being raided so much too. This was something one suggested on a Kiwi forum before the Force started up though I had no idea then that Queensland would be hammered so much.
But beyond the start phase, ending in 2015 when the Melbourne dispensation ends, we can't sanction the employment of too many foreigners. We have only 5 professional teams and unlike NZ and the RSA we have no semi-professional rugby between Club and Super rugby to assess domestic players in. Super rugby is the first exposure of Oz players to rugby above the Club level and we have to process as many as we can week in, week out to pick our national squads.
Things are not black and white: they never are in life. I can see arguments the other way.
What the ARU have to do at the elite level (there are more pressing problems at grass roots IMO) is to put things in place so that NSW and Qld players are encouraged to move to Vic and WA (the Brumbies are already nearly all from outside the ACT).
Because of the tyranny of distance the Force will likely have the greatest need 5-10 years from now. Melbourne, closer to NSW and Qld, will be better off.
What those things should be could be the subject of a new thread but I am convinced that the continued use of of a lot of foreigners is not the right answer.