Media Super chair Gerard Noonan said industry funds' high levels of disclosure had left them open to claims of misuse of member money and under-the-table payments.
Media Super has boosted disclosure in its 2011-12 annual report, including the salaries of its top-paid executives and payments to industry organisations to release directors from their day-to-day duties.
"It's one of the difficulties in disclosing this information - we leave ourselves a little bit open to what I think is a completely spurious charge that money is being paid to employer associations or unions as though it shouldn't be paid there.
"It's the downside of good disclosure," he said.
Noonan said finding information on retail funds was near impossible, including the names of the trustees. He said it was because many of the trustees were directors or senior executives of a bank.
"There's a clear conflict of interest between owning a for-profit and being the director of a trust where you are perhaps being obliged, or where there's a constitution about, whether you direct the investments back into the bank again," he said.
Noonan said that while industry funds had taken heed of the Australian Securities and Investment Commission's and the Australian Institute of Superannuation Trustees' improved disclosure requirements, other areas of the super sector should be looking more closely at access to information.
Vanguard Super has reported strong returns across most of its investment options, attributed to a “low-cost, index-based approach”.
The fund has achieved double-digit returns amid market volatility, reinforcing the value of long-term investment strategies for its members.
Australian super funds notched a third consecutive year of strong returns, with the median balanced option delivering an estimated 10.1 per cent over the 2024-25 financial year, but an economist has warned that the rally may be harder to sustain as key risks gather pace.
AustralianSuper has reported a 9.52 per cent return for its Balanced super option for the 2024–25 financial year, as markets delivered another year of strong performance despite the complex investing environment.