The old award did not have adult rates.
When I did the numbers on new award it was about $700 a week for a 1st year, this was far too much and we never took on anther apprentice under the new award (Trade School,Holidays, Public Holidays and sick leave = away from work about half the year).
With Supa that works out to costing $20 per hour even when not at work, then a LAME cost to train and the costly mistakes like connecting up battery wrong (both terminals are red - its the colour of the crimps!)