I would suggest quality over quantity. As an employer, you get countless resumes/applications from Seek where people haven't bothered to read the job or tailor their approach to the organisation etc. These would generally get binned without a reply given the volume and the spam-type issues employers have to put up with.
So rather than just playing the numbers game, making each application suit the vacancy is the best approach.
Moz - research backs you up...
Australian bosses are racist when it's time to hire PETER MARTIN
June 18, 2009
A FOREIGN or indigenous-sounding name gives people less chance of landing a job in Australia, a study has found. Unless your name sounds Italian and you're in Melbourne, in which case it can be an advantage.
Full article:
Australian bosses racist: study | Foreign or indigenous names 'decrease job chance'