A conspiracy theory

Here's a wild thought - given the political antipathy that England and Australia both have for Zimbabwe, is it possible that England was not trying hard enough in its T20 match with Australia? Obviously, an easy win for Australia takes both England and Australia into the next round, and knocks out Zimbabwe. What else can one make of Collingwood's decision to bat first, given his general preference for chasing, the accepted wisdom of chasing in T20 cricket, and the likelihood of Aussie tentativeness if they had batted first after their collapse agaisnt Zim?