We’ve now entered the traditional pre-budget softening-up period in which treasurers engage in expectations management ahead of the fiscal set-piece of the year in May. But even given that, Joe Hockey is treating us as complete idiots.

The line Hockey has been pushing for some days now, and which he gave a big push to yesterday in a flurry of media appearances, is that not merely did Labor hide the level of deficits in the current budget cycle, but that it left a series of hidden spending commitments in the unpublished years beyond forward estimates. Hockey has been circulating a document to journalists portrayed in the media as a “Treasury analysis” that shows how “the Coalition inherited an unsustainable budget position” and Labor “hid [expenditure] from the public”. Hockey would like us to see him as a budgetary innocent who has found himself in the middle of a fiscal minefield planted by Labor.

Well here’s the document, and it isn’t a “Treasury analysis” — it’s prepared by Hockey’s media adviser, former Australian Financial Review journalist Gemma Daley. And if Hockey seriously expects us to believe his latest argument, he must have nothing but contempt for us. This is Hockey yesterday:

“We didn’t anticipate that everything else would be of equal or larger scale as a tsunami coming across the water. The fact is Labor’s left us with a massive forecast increase in foreign aid, a massive increase in defence – for example in one year, there’s meant to be a real increase in defence spending of 13 per cent, a 66 per cent increase in foreign aid.”

At another media conference, he said:

“If no action was taken on the budget, what the fifth-year deficit would look like, contrary to what both Labor promised was a surplus, if no action was taken, based on the approximately 6% increase in expenditure between the fourth year and the fifth year, which Labor locked in on NDIS, on Gonski, on overseas aid, on hospitals, on defence …”

Well, um, tsunamis are actually tiny when they’re on the ocean — but never mind that, let’s look at the detail. Labor in fact revealed the funding for the National Disability Insurance Scheme — or DisabilityCare as it had been renamed — in the budget last May, with new spending broken down out to 2019:

In addition to the numbers in the budget papers, there was a specific “glossy” with funding graphs for DisabilityCare and one for education funding as well, which was still being finalised in deals with the states. The increase in foreign aid was also in both the budget papers and a ministerial statement by Bob Carr — not that the government got any credit for it, because it was actually a reduction, with the government’s Millennium Development Goal commitment to lifting foreign aid to 0.5% of gross national income put back another year to 2017. The government spelt out its planned increase in foreign aid up to and including 2017-18.

In fact in question time last week, Labor invited the Prime Minister to spell out the government’s MDG policy, which he duly did: aid is to reach 0.5% of GNI when the budget returns to surplus. Which raises the question of why, in Hockey’s Mid-Year Economic and Fiscal Outlook in December, Hockey left Labor’s MDG aid funding increase intact, in defiance of the government’s own policy. The answer, of course, was that it would inflate the budget deficit for 2017 and beyond.

As for defence, the Gillard government gave the portfolio a “guidance” that it would receive around $220 billion in the six years from 2017-18, which Hockey’s document proposes to mean funding would leap 13% in 2017, when in fact the “guidance” reflects a growth rate in defence spending from 2017 lower than the average between now and 2017 of nearly 7%. And remember that Labor was repeatedly criticised for decreasing defence spending — every armchair general and arms industry lobbyist in the joint was whinging about how we weren’t spending enough taxpayer money on buying gear from the US military-industrial complex. “Military spending slumps to 1930s level,” The Australian‘s Paul Kelly shrieked. The 1930s theme — hint, appeasement!­ — was picked up by the Coalition, including Tony Abbott and Barnaby Joyce. Abbott “aspired”, he said, to lift defence spending to 3% of GDP.

So, Labor were both neo-Chamberlain surrender monkeys for not spending enough on defence when in government and now, magically, reckless spendthrifts who committed too much to defence at the same time.

Hockey’s fiscal innocent act is a little hard to believe given we were told what an exhaustive, indeed exhausting, shadow ERC process Hockey was leading within the opposition at the time to establish its fiscal credibility.

And above all, there’s this point: if Hockey seriously believes his own claims about the budget beyond forward estimates, why did he remove Labor savings measures that offset future spending? Why did he remove the 15% tax on superannuation income over $100,000 a year, costing the budget billions beyond forward estimates, for the benefit of high income earners? Why did he restore the Fringe Benefits Tax rort on novated leases — remember Joe being photographed in front of a sports car? And why have Hockey and his leader pushed for the abolition of the mining tax, which even in its crippled form, according to Hockey’s own MYEFO, is worth more than $3 billion over forward estimates? Eventually it will be the only way of recovering some of the profits offshore owners of LNG and iron ore projects will make and ship overseas (over 60% of these projects are foreign owned or controlled).

Then there’s the silly decision to hand $8.8 billion of borrowed money to the Reserve Bank in one hit, when it doesn’t need the capital. And the sale of Medibank Private — a $4-5 billion contribution to the budget — will be spent on roads because Abbott wants to be an “infrastructure prime minister”, when it could cut the budget deficit or the debt. That could be $13-14 billion off the deficit and debt right there — or an interest saving of more than half-a-billion dollars a year.

Hockey is talking about sharing the budget burden around, but that’s only after the government plans to increase its own spending for political purposes and sought to hand billions of dollars in tax revenue back to foreign mining companies, large carbon emitters and the well-off in the community — revenue that would have offset exactly the spending on education, disability and foreign aid that Hockey is now claiming to have only just discovered.