A Sydney construction site affected by lockdown (Image: AAP/Dan Himbrechts)

Josh Frydenberg and his beleaguered PM Scott Morrison might find themselves regretting that the much-demonised CFMEU, a favourite government bogyman used to scare the electorate, doesn't have more sway with the Berejiklian government. So might a lot of major construction companies.

At no stage in Victoria last year did Daniel Andrews ever shut down that state's construction sector -- a sensible decision given the lack of transmission of the virus on building sites, but also one that reflected the power of the construction sector union in that state.

But Gladys Berejiklian announced a different approach on Saturday, shutting down all Sydney construction -- from mega-projects like Westconnex right down to bathroom renos -- in a move that took the sector, and the other industries that rely on it, by surprise.