So Steve Bracks has retired/resigned as Premier of Victoria joining Gallop (WA on health grounds), Bacon (Tas on health grounds), and Carr. It was interesting to note that Steve Bracks' colleagues didn't want him to resign, as well we know Bob Carr's didn't. We also know that Gallop and Bacon's colleagues didn't either, though perhaps they accepted it a little more willingly.
So while John Howard has clung to Kirribilli House - I mean the Prime Ministership - four Premiers have departed voluntarily. And if any of them had used the standard "I will remain Premier so long as my colleagues want me to and it is in the best interests of the Labor Party" they would still be there.
Which just makes you think it is the wrong standard.