Senate block could force G20 rethink

Treasurer Joe Hockey has reopened debate on the federal budget and economic strategy, saying "additional plans" will have to be found if Australia's G20 commitments aren't met.

All G20 members have backed an Australian plan to bring forward individual country growth strategies to boost the global economy by at least two per cent by 2018.

The plans will be laid out by G20 leaders by the end of their annual summit in Brisbane on Sunday.

Australia's commitments face the risk of being blocked in the Senate by Labor, the Australian Greens and key crossbenchers - just as some key parts of the budget have already been rejected in the upper house.

"Everyone is determined to deliver on their plans and if you can't deliver on these plans you have to find additional plans," Mr Hockey told reporters on Thursday.

"Because the only way we are going to get economic growth is through structural reform here in Australia and right around the world."

Mr Hockey said G20 countries had submitted 1000 policies to be assessed by the IMF and OECD.

The two bodies will report back on what the plans mean for global growth over five years.

"Then the challenge will be to implement those initiatives and it will take the deep resolve of leaders - together with everyone else - to make sure our plans are delivered, so that we do get the dividend of stronger economic growth and more jobs."