Yea, there's heaps of other job opportunities e.g. working in banking industry and much more:
School of Mathematics and Statistics - Careers
The government, beginning of this year, also slashed the HECS debt off maths courses - $10,000 discount for maths, science degrees under HECS changes | The Australian
So we are basically paying the half the cost as it was used to be. Win-win situation imo.