Mr Parker said National was wrong on three major counts which between them counted for more than half of the $17 billion 'made up hole' in Labour's figures.
National's own figures, against which Labour's were being compared hadn't factored in lost dividends from selling up to half of state owned enterprises, "despite it standing out like dog's balls''.
"You can't sell an asset and pretend you're still going to get the revenue... Within four years that's half a billion dollars.''
Labour's figures this morning show it expects to receive ordinary and special dividends from the SOEs of just over $845 million in the next financial year, rising to $1.28 billion five years later.
Under National, that cashflow would be halved.
Mr Parker said National had also "tried to ping us'' for resuming NZ Super Fund contributions.
"They've ignored the asset it purchases, how fair is that?''
The third major misrepresentation was over the cost of Labour's plan to part fund the Auckland rail link.
"They have said we have not funded that. You all know that we are funding that through cancellation of the holiday highway and in fact we come out ahead.'
National had budgeted $1.7 billion for the project but Labour would spend $300 million to 400 million making the "required'' but cheaper highway improvements leaving more than enough for the $1.2 billion it has said it would contribute to the rail link.
"It is not us that have misrepresented the Standard & Poor's downgrade, it is not us that said the capital gains that would put a dagger throught heart of the economy and it's not us that's misrepresenting the figures.''
But Mr Key said Labour's claim that it would only borrow $4b over the next four years was a "shambles",
"If you take the New Zealand Super fund, for example, he's saying if you have a mortgage against your home, that [debt] doesn't count and the day you buy the house, you should book the profits of what you think you might be able to sell the house for some time in the never-never.
"And he's wanting New Zealanders to believe that's real, at a time where we're living through the most volatile financial markets and stockmarkets in the world.
"It might be a form of economic management that Greece is happy with, but it will not work in New Zealand."
Mr Key again played the "I spent my life as an investment banker" line to talk up his financial literacy.
"The definition of borrowing is where you issue a bond. Ask Phil Goff if he'll be issuing bonds for $4b, or a lot more than that."
He said restoring ECE centres to having 100 per cent trained staff would cost $400m a year, and the Government only has $800m in new operating money a year.
"Their numbers don't add up. They're using a Greek calculator."
But a Labour spokeswoman said Labour's numbers included an allowance yet to be announced policies over and above that $800 million.
"We have not announced our ECE policy and we have not announced how much we will spend on it. So he is wrong on all counts.''
