I'm a bit confused here.
My understanding is that Inheritance (money) is not taxable... but if you contribute to Super then it is taxed at 45%! Why would you do that if that is the case? Surely I'm missing something here.
Where did you get that from!?
There are 2 ways to contribute to super.
1. The concessional contributions - capped at $25k or $35k for over 60s.
This is taxed at 15% on the way in - but you may salary sacrifice which means you would not be taxed on the wage but divert it before it is taxed, which could save you 46.5%
And,
2. The non concessional contributions. These you cannot receive a tax deduction for because it is paid into the fund with cash after you have earned it, or received it. This is limited to $150,000 per person per year. But there is a bring forward rule which enables a person to pay $450,000 at once by bring forward 3 years of payments. Thus 2 people could contribute $900k in one hit.