There's no rush for ScoMo to fulfil one of his few campaign promises this early in the cycle. All he has to do is put it to the House in the last weeks of the government and tell the world how great he is and they'll believe him.
I fully appreciate the figure about 30% of workers not being able to pay an unexpected $500 bill, indeed I saw it recently when the employer of a person I know, had a computer glitch and paid their employees a week late.
The person concerned literally had no money and had to borrow from her parents to pay a regular bill that was due immediately.
Another way to relieve financial stress on employees would be to pay them a fair wage and really punish wage theft by employers.