A U.S. contractor bilked the American military out of $50 million spent on Bentleys, Aston Martins and big salaries for senior staffers significant others, according to a government audit. Senator Claire McCaskill demanded on Wednesday that the Pentagon explain why it was allowed to get away with it. The British company New Century Consulting (NCC) was deployed by the U.S. overseas to train Afghanistan forces. It was originally subcontracted by the now-defunct company Imperitas from 2008 to 2013 but has since taken over the contract completely. Under Imperitas, NCC ... paid the significant others of senior staff an average of $420,000 as executive assistants who worked from home, auditors found. Its not clear whether Imperitas or NCC actually completed their work in Afghanistan, as neither retained complete training records. In a letter to Secretary of Defense James Mattis Wednesday, McCaskill ... wrote that NCC was unable to provide evidence that these executive assistants actually performed any work. This is not the first time that NCC or Imperitas spending has been questioned or the companies investigated. In 2016, a federal lawsuit was brought in New York by investors against Imperitas. In 2015, the special inspector general for Afghanistan reconstruction had an ongoing criminal investigation open against both NCC and Imperitas. And in 2012, two former employees of Imperitas ... sued the company, alleging their co-workers abused alcohol and drugs and possessed illegal weaponsall violations of U.S. policy.