So the government will increase the superannuation contributions tax to 30% but only for people who earn more than $300k per year. This is said to reduce the budget deficit by $1 billion. But if there are only 128,000 people earning more than $300k per year the total is:
128,000*$25,000*.15 = $480 million
To get to $1 billion you either have to assume that they are all over 50 with less than $500k in super in their accounts, or use 30% by mistake in the calculation. So everyone from $180k to $300k per year in income will get a 30% concession and those of us earning between $80k and $180k will get a 23% concession. But those earning more than $300k only a 15% concession. Of course, this doesn't make a lot of sense and makes super more complex. It would make much more sense to abolish the concessional tax on contributions and if that is too severe an increase in tax also cut the rate on superannuation earnings a little. This would make the system much simpler by getting rid of the distinction between concessional and non-concessional contributions, salary sacrificing etc. Of course, Labor is still hoping that public servants and maybe some others earning between $80k and $300k a year will still vote for them. So they haven't raised their tax.