The prudential regulator has warned the Albanese government that cyberattacks on large superannuation funds will increase in size and frequency, and that future shocks to the $4.1 trillion super sector could threaten the stability of the banking system.

In a briefing prepared in May for the re-elected Albanese government, released to The Australian Financial Review under freedom of information laws, the regulator also said access to home loans was increasingly limited to the rich, and Australia’s high level of household debt was a significant risk to the financial system.