Super
Australian superannuation tax – you can generally contribute up to $30,000 each financial year to your own pension fund. These contributions are taxed at 15% on the way in. If you earn over $250,000, you may pay an extra 15% tax—then in total, you’ll pay 30% tax on some or all of the contributions.
On the other hand you could set up a charity which has no tax, in fact your contributions to it will be tax deductible on your personal income assessment. The charity would of course to be to help older people live with dignity, and you would be the primary, possibly only, beneficiary.
I suggest this to point out the craziness of our tax system.