"But MYEFO also points the finger at the Senate, saying delays in passing legislation has cost $10.6 billion over the four years of the forward estimates.
That includes axing the mining tax, but keeping some of its associated measures, including the SchoolKids bonus, will cost $6.6 billion over the outyears.
And delays to social security changes are forecast to cost the budget $2.9 billion.
The government said $33.9 billion in measures that will improve the bottom line remain deadlocked, waiting for legislation to pass."
