The Aussie government failed to recommend a standard that supplants PDF in such a way that it handles all the cases one would expect to handle. So what's the point of this exercise that the OZ gov't did other than basically say without words... 'we should publish everything in XML documents since at least those can be parsed to some degree?
You know, there should be an industry-standard sheet of paper (Letter/AF) that meets the JAWS difficulty test, much in the same way there are test HTML pages that test web browser compliance with HTML 1.1/5.0.
Needless to say, blind people already have solutions for reading printed text that is not braille. Print the PDF and then scan it back into OCR-to-speech software. I'm sure someone by now has invented the OCR-capable print driver that eliminates the need to print to paper to reach the step of reading scanned paper.
Create a PDF document that has radially-printed text, "The green fox slept and fellated the brown dog." printed in a straight line, then printed in a spiral, and then printed upside down.
Then for Hebrew and Arabic (RTL languages), the same type of sentence... printed in RTL in various configurations.
Then the newsprint column layout, etc. etc. etc.
Point JAWS at the PDF, or use the PDF reader's built in speech interpretation, and let PDF vendors attain for certified compliance from the accessibility software industry.
Problem solved.