-- Joker, her salary is taxed. Your measly $500 per week includes the GST your pax have paid, and you collect, on behalf of the ATO. Not the same thing.
A simple calculator will advise you that your GST on your measly $500.00 is a paltry $45.
very small in size or quantity; not enough;
1. too small to be considered as important or useful;
2. have no value or useful qualities;