I know a couple of IPA people and whilst they're nice and genial characters, they are somewhere to the right of Henry Ford on economic issues and intimately associated with the Liberal Party. This is all just puff and wind - the real target isn't Zoos Victoria and they couldn't care less about palm oil labelling. They're just stirring trouble 5 months ahead of a state election.
It should also be mentioned that Zoos Victoria is a statutory authority and engaging in lobbying is no different to Quit Victoria or the Victorian Institute of Teaching doing so. It's a defining feature of the IPA's peculiar brand of moral outrage that they get worked up over Zoos Victoria opposing deforestation or Quit opposing tobacco advertising... but would never dream of protesting, say, Crown Casino lobbying against gambling restrictions or business groups attacking the re-introduction of basic workplace conditions.
Is IPA the owners of a magazine called QUADRANT If so anyone who knows that magazine will know where the organisation stands on enviromental grounds.
Quadrant and the IPA aren't the same organisation, but they do share a similar position on economics (Quadrant's more socially conservative) and a broadly similar milieu of theorists/activists/supporters.