I completely agree its a labour cash grab to attempt to return to surplus. A government in debt is not a good scenario and I'm all in favour of them returning it to surplus.
Where else would you like the money to come from? They have already introduced a new tax affecting companies, and they are smart enough to realise that making business unprofitable will only hurt to economy in the long run.
Schools? Public health? Welfare?
The fact is, people are going to complain regardless. A small increase to those who should be fairly comfortable is the least we all have to complain about.