Australia-A thus qualified for the September 26 final along with India-A, who also defeated Kiwis with a bonus point yesterday.
The second successive defeat suffered by the Kiwis has reduced the final league match between India and Australia on September 24 to academic interest, but would serve as a dress rehearsal for both the teams ahead of the final.
Badly in need of a win to stay afloat, the Kiwis chose to bat first under cloudy skies. But the decision boomeranged as they collapsed like a pack of cards and were dismissed for 144 in just 37.3 overs.
From two for two, the Kiwi innings got a facelift through a 97 run stand for the third wicket between Peter Fulton (65, 72b, 3x4, 4x6) and Greg Hay (36, 75 balls, 3x4) in 21 overs.
Fulton added another 28 with Grant Elliot (12) for the fourth wicket, before the Kiwis caved in meekly from 99 for two to 127 for three in 29.3 overs, to be bowled out for a poor total.
They lost their last seven wickets for 17 runs in eight overs with leg spinner Cameroon White returning with a haul of four wickets.
The Aussies hardly faced any resistance as they overhauled the target with plenty of overs to spare finishing at 145 for two in 24.5 overs to win with a bonus point.
After the early fall of Luke Ronchi (two), Phillip Hughes (37 not out, 69b, 2x4) and David Hussey (78, 56b, 10x4, 3x6) laid the path to victory with a 112 run stand for the second wicket in 18.4 overs, before Cameroon white dealt some lusty blows to ensure a quick finish. White struck four fours and a six in his 23-ball 22.
Both India and Aussies have nine points each, while the Kiwis were all set to take an early flight home with just two points.