The union that represents public servants says the glitch at Westpac that's left many without pay shows a review is needed.
The government's banking partner has taken to Twitter to apologise and say no one will be left out of pocket.
The Public Service Association says members have been contacting the union all day, worried about mortgages and other bills not being paid.
National secretary Richard Wagstaff says Westpac has been the government's banker since 1989 and there have been calls for a review of this arrangement.
He says the error shows the government should go back to tender for a banking provider that can guarantee good, secure and stable services.