Todays Commonwealth donationsdata releaseis a stark reminder of the deep flaws in our political donations system.Contributions to political parties are revealed up to 19 months after the event, and sometimes not at all. Withmost states now operating far more transparent regimes, the only conceivable explanation for the current Commonwealth system is that our political leaders dont want us to see where the money is coming from. And the information contained in todays data dump gives clues as to why that might be.

The most concerning revelation in todays release is the extent of political donations from gambling businesses in the lead-up to the March 2018 Tasmanian election. Tasmania relies on Commonwealth rules and processes to make donations public.

The future of poker machines in pubs and clubs was a key election issue: TasmanianLabor proposed to get rid of the machines by 2023, whereas the Liberals wanted them to stay for at least 25 years.

The hotels lobby ran an intensive advertising campaign during the election. Many commentators suspected pro-gambling lobby groups were also using political donations to support their cause. But its taken until today to reveal their donations.

The Tasmanian Liberal Party (who won the election) declared more than A$400,000 from pro-gambling groups in the lead-up to the state election equal to nearly 90% of the partys declared donations, and a ten-fold increase on the amount gambling groups gave in the previous election.

Some A$50,000 came from the well-known Federal Group, a family business that runs casinos and gaming assets across the state. Pro-gambling donors gave nothing to Labor, and Labors Tasmanian branch received a total of only A$160,000 in donations for the year.

Heavy reliance on a single donor industry creates the risk ofundue influenceover policy. Tasmanians would be right to question the effect on this inflow of funds from the gambling lobby on their democracy.

The Tasmanian example also neatly highlights thelack of transparency in the Commonwealth regime. Tasmanian voters have waited 11 months to see where the money came from.

In the age of the internet and instant communications, theres no good reason for this: donations are revealed in close to real time in several Australian states.

Tasmanian donations also reveal problems with the disclosure threshold. Parties have to declare donations of A$13,800 or more. But theyre not required to release the details of donations under the threshold even if a donor makes a series of smaller donations that together exceed the threshold.

The Tasmanian Hotels Association declaration reveals that, just two days before the election, they gave A$57,000 to the Liberal Party in seven separate donations.

Because each donation was under the threshold, these donations are not identified in the Liberal Party declaration. The only way for the public to find out about these funds is to guess who might have donated and go hunting in the donor records.

The national returns for the parties shows how significant this issue is. Around half of the Coalitions funding and a third of the ALPs funding we know nothing about. A lot of this is likely to be donations below the disclosure threshold. Some of this will doubtless be from mum and dad donors who like to give small amounts to their preferred party.

But a lot is probably donation splitting from groups adopting a similar approach to the Tasmanian Hotels Association.

Despite its deficiencies, the data does reveal some interesting things about how our political parties are funded. Parties received A$154 million in political donations, public funding and other income in 2017-18, down 25% from 2016-17. Its normal for funding to drop outside of election years, but the parties will be keenly seeking to boost their coffers in the lead-up to this years federal election. Unfortunately voters wont be told anything about that money until 2020.

The data reaffirms the importance of union money to the ALP, and of hotels and mining money to the Coalition. The ALPs biggest donors and contributors include the shop assistants union (A$1.4 million), the Electrical Trade Union (A$940,000) and the CFMEU (A$530,000).

The Coalitions biggest contributors include the Waratah Group (A$175,000) and the Australian Mining Group (A$170,000). Hotels associations from around the country were also major contributors, giving a combined total of more than A$600,000 to the Coalition.

Both major parties received A$250,000 in donations from ANZ, interesting given the Royal Commission but consistent with the banks recent practice of making significant donations to both sides.

Todays donations data release will only fuel peoples cynicism about the role of money in politics. If political parties want to start to rebuild the publics trust, making donations releases more timely and transparent would be a good place to start.

Danielle Wood, Carmela Chivers and Kate Griffiths are respectively Program Director, Budget Policy and Institutional Reform, Associate and Senior Associate at the Grattan Institute.

First published The Conversation, 1 February 2109.