The Reserve Bank of Australia has issued a warning about the potential risks to the superannuation system due to increasing liquidity demands from retirees. The regulator noted that as more Australians approach retirement, the financial stability of the system could be threatened. The warning comes as the number of retirees grows, putting pressure on the superannuation funds. The RBA's advice highlights the need for careful planning and management of superannuation assets to ensure the system's sustainability.