Which Friday does that refer to? before the time of that article or after?
I'm not sure. It hasn't been done yet though. They've actually gone to an accounting firm instead. Why not the Treasury, considering the Charter of Budget Honesty was their own government's (Howard) initiative?
Because, if you read TrueLight's links, the fact that Labor is in power means Liberal cannot trust the Treasury. It suited Mr Howard then because he was in power.
Which brings back to my original point, the Treasury's analysis is all speculations, not the actual costing. And Mr Abbott's decision to not submit it to the Treasury is well supported by TrueLight's links.
On your point about the PBS cutting, your link went nowhere. That aside, I can see merit in arguing that some people who are well off enough don't need the level of PBS cover as others, and some types of medicine (or brands of medicine) don't need the level of PBS cover as others. If they are planning to bring on a reform that makes PBS scenario based, so if I can afford my medication, I'll still pay for it, that will be an excellent reform.
In this way, the government can use the saved taxes to pay the debt/fund other things, and let the financially-able residents foot the bill, as opposed to raising the taxes and force everyone to pay.