That is an interesting initiative.
Unfortunately, the problem is not the teacher numbers entering, it is the number of teachers who leave shortly after starting, as much as 50% of the teaching graduate cohorts leave within 10 years. Around 60% of people who hold teaching degrees or certifications do not work as teachers.
As someone in their 14th year as an educator, I can tell you that the job of teaching/training/tutoring is unendingly harder than people tend to think and is never done as well as it could be.
Regardless, having slightly more well-organized high school entrants/mature aged students will definitely help a little, but the education industry/sector in Australia has a long way to go before it works like it ideally should.