goods & services is only 10%, I think you meant group tax which would be correct if no TFN was supplied or its a 2nd job.....either way its always adjusted end of financial.
really bugs me that if you're an employee these days, there's no incentive to do overtime due to tax bracket creep.......so in answer to an earlier question Ben, thats one of the good reasons to be self employed even if you get tied to your job like I've been lately (missing out on cruises & social gatherings )