It really didn't a take long for some details, at least the "bottom line", on Tony Abbott's costings to appear. Secretary of treasury, Ken Henry, was involved in briefing the 3 Independents about Treasury costings of Coalition election promises. Treasury estimates a shortfall - "black hole" - ob between 4& Billion and $11 Billion.
In typical politician style, Tony Abbott tried to brush aside concerns, saying that they were merely "differences of opinion". One of the differences is that Treasury refused to allow the Coalition to adjust the conservative bias allowance, a $2.5 billion blow to its costings. This allowance, used by Treasury in all its costings, ensures that the extremes of "estimates" by politicians are moderated. It seems to imply that the Coalition used the most optimistic figures it could, perhaps a more economically reckless approach.
Joe Hockey put in his 2-bit's worth, saying "It is not a black hole because fundamentally we are taking this out of surplus." But it's a surplus they don't have, and which they seem to have estimated at the most optimistic figure they could think of.
This whole concept of not using Treasury ( a principle created by John Howard & Peter Costello, because it gave them an advantage in government; it's just come back to bite the Coalition parties!); of planning it back before June ( at least 2 months before the election was called); of using a company with links to the Liberal Party; and using the most optimistic figures have all contributed to The Liberal Party's problems, real or perceived, as NOT being better economic managers than Labor.
mmm .. what's that old saying??? Oh, yes! "When first you practise to deceive ... "