The royal commission into the financial sector is yet to set up a system to collect bank victims' stories.
Mr Bowen has pointed the blame squarely at the prime minister's "reluctance".
Meanwhile, the Australian Council of Trade Unions has set up a special website for bank victims to send their submissions.
ACTU President Ged Kearney says unions would collect victims' stories, and the information will be later passed on directly to the royal commission.
The $75 million royal commission is due to make its final report by February next year.
