A rejuvenated rail trip between Adelaide and Melbourne trumps flying, says Gregg Tripp.

Sammy Wong, the husband of former Cabinet Minister Pansy Wong, is under investigation by the Auditor-General. Late last year Labour MP Pete Hodgson called for an inquiry into Mr Wong's use of tax-funded travel perks.

Alasdair Thompson, chief executive of the Employers and Manufacturers Association, says the Super City needs to put its capital to work where it's most needed.

Since 91 unleaded hit the $2 litre mark, public transport has become a la mode.