One of Sydney's favourite sons has returned, with Jared Crouch joining the AFL club's coaching staff.

The 32-year-old will help former teammate Henry Playfair as assistant coach of the Swans reserves team, while also working with former Swans skipper Stuart Maxfield in his role as the club's development manager.

New head coach John Longmire said Crouch was the perfect addition to help shape the club's young roster.

"Jared has been a fantastic Swans person for many years," Longmire said.

"He's very passionate about the club and is really keen to help our next generation of young players, including those on our list and in our Academy."

Crouch was keen to share his experience gained over 223 AFL games.

"I'm looking forward to sharing my knowledge and experience with the up-and-coming players and helping them make the most of their careers," he said.

Asked if the big four banks were too big to fail, Mr Stevens said even the failure of a small entity could be quite disruptive if people panicked enough in a crisis.

He said banks were supervised intensively, and APRA was quite prepared on occasion to tell banks to meet the minimum requirement if it felt it was appropriate from an individual risk or systemic risk point of view.

"This is the nature of banks. It's a tricky area because banking is not just like any other business," he said.

"A bank failure, even a not so big bank, isn't just like the failure of another business, where someone else comes in, buys the assets, employs the people and everything else keeps going."

He said regulation was much more intrusive on a bank than on the average industrial company.

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