It's always been the case that the more money you have, the less tax you will pay. That's because there's schemes available to the big end of town that are not available to the 'schmucks' like us.
However the big end always likes to cross the line between tax avoidance (legal) and tax evasion (illegal). The latest hot spot is the practice of internationals 'transferring' profits made in Australia to other countries and paying less tax there and none in Australia.
Note to the treasurer - DO SOMETHING ! At a time when revenue is down and expenses are up we are bleeding revenue to multinationals - it's not good enough.