I beg to differ, I really don't understand why this keeps coming up. Most if not all RA-Aus instructors are GA instructors these days and the standard of RA-Aus training is very high indeed, often as high or higher than GA schools offer. With the number of GA schools closing at present due to a lack of interest and nearly no new students, RA-Aus should be considered for the full 1,500 hours for ATPL, otherwise there will be a pilot shortage.
For those interested in Recreational Aviation just google it and there you will find links to fun and friendly places to talk about Recreational Aviation in Australia. Most airline pilots these days in the large jets started in ultralights and I know of a few off hand that are flying the A380. Ultralight flying made them the pilots that they are today! Ultralights have come a long way though, from 2-stroke Thrusters to Jabirus that go faster and are better equipped than many GA aircraft on the market.