How far should party discipline go? Not as far as certain proponents of same-sex marriage would like it to in the Liberal Party.
Last year Joe Hockey was quite clear: he issued a discussion about the Australian tax system, and promised a green paper on options and a white paper on government policy.
Treasurer Scott Morrison has opened the possibility for an alternative to the government's present white paper process for tax reform.
The key events that made the business community laugh, cheer and despair in 2015.
Malcolm Turnbull has had a remarkable start to his prime ministership. Even in the little things.
Is Labor's Shadow Assistant Treasurer, Andrew Leigh, right to warn that each household may effectively face the prospect of paying an extra $4,500 a year in GST?
If only the debate around the GST focused on what it takes to make a good tax system.
Treasurer Scott Morrison has declared that differences between federal and state governments over tax reform may be "irreconcilable" because states want to use funds from a GST change to spend more.
Despite all the media coverage, don't expect any clear decisions on national tax reform on Friday. But we should see more progress on other issues, including domestic violence and violent extremism.
Former Howard government minister Peter Reith talks about the current challenges facing the Turnbull government.
There isn't a magical formula which compensates everyone for an increase in the GST - but there is a way to ensure fairness.
Calls for GST on banking make sense, but working out the ultimate benefit is no easy task.
It would be easy to misinterpret a recent comment by federal Treasurer Scott Morrison as meaning that states and territories generate 90% of all revenue collected in Australia. That's not the case.
The tax mix switch logic the government seems to be pursuing is unlikely to have the desired effect.
Business Council of Australia president Catherine Livingstone has told Malcolm Turnbull he has had an "almost unparalleled" impact on national sentiment since becoming prime minister.
The current GST debate slides over the issue of compensation - proposals so far are poorly defined and run into cost and fairness problems.
The Australian Council of Social Service has released modelling on the regressive effects of increasing or broadening the GST.
Former ACT chief minister now senator Katy Gallagher admits she has found the jump into the bigger political pool challenging.
Tax reform will be a hard sell, even for a prime minister of Malcolm Turnbull’s standing and imagination.
Splitting the Goods and Services Tax in two, and taxing goods at a higher rate, would help to reflect the extra environmental damage done by products that are bought and later thrown in the rubbish.