Belatedly recognising the damage the ongoing scandal of Bronwyn Bishop's misuse of her travel entitlements was doing to him and his government, Tony Abbott has announced the Speaker's resignation and a root-and-branch review of parliamentary entitlements. The decision comes after more evidence had emerged this morning of Bishop's extravagant use of limousines and chartered aircraft in News Corp papers, but the announcement is just hours after another government minister, Barnaby Joyce (who has had his own troubles with travel entitlements), defended Bishop, saying the Speaker was "a lady who probably, especially when things are busy, it's not unreasonable that she will have someone help her drive to whatever job she's got".