Malcolm Turnbull has had many high-profile careers, including as a barrister, merchant banker and aspiring media proprietor. By far his most lucrative, however, was in the IT industry.

Former US Secretary of State Hillary Clinton isn’t the only one who used a personal email account to conduct government business, with sole discretion over which emails she kept or deleted. US Department of Energy employees routinely use private email accounts for public business and decide on their own which emails to keep or delete, according to the DOE Office of Inspector General. The US government employs more than 13,000 people at the department.