In October the government became embroiled in another embarrassing controversy over the alleged misuse of VIP aircraft, which came to a head when John Gorton (Government Leader in the Senate) tabled documents that showed that Holt had unintentionally misled Parliament in his earlier answers on the matter. Support for his leadership was eroded even further by his refusal to sack the Minister for Air, Peter Howson, in order to defuse the scandal, fuelling criticism from within the party that Holt was "weak" and lacked Menzies' ruthlessness. Much of the blame for the episode within the Public Service was visited upon Sir John Bunting, Secretary of the Prime Minister's Department, although other figures such as the Deputy Secretary Peter Lawler were able to protect themselves. One of John Gorton's first acts upon becoming Prime Minister in January 1968 was to sideline Bunting by creating a separate Department of the Cabinet Office with Bunting as its head, and replaced him with Lenox Hewitt.