Education Secretary Betsy DeVosElizabeth (Betsy) Dee DeVosAmerican women will decide who wins and loses in 2018 elections Trump, Pence to address CPAC this week House Dems call for first Education Committee hearing on school shootings since Sandy Hook MORE uses her private jet to conduct government business across the country.

Education Department Press Secretary Liz Hill told The Associated Press on Thursday that DeVos travels completely on her own dime, accepting no government reimbursement for flights or other expenses.

“Secretary DeVos accepted her position to serve the public and is fully committed to being a faithful steward of taxpayer dollars,” Hill said.

Health and Human Services Secretary Tom PriceThomas (Tom) Edmunds PriceGreen group calls on Pruitt to pay back first-class flight costs Top Dems seeks answers from HHS on ethics lapses GOP lawmaker calls for Shulkin to resign MORE’s government travel drew attention this week after Politico reported that he took five privately chartered flights for government business, though cheaper commercial options were available.

Democratic lawmakers on Wednesday called for an investigation into Price’s travel expenses.

During her time in office, Hill said, DeVos has charged travel expenses to the government just once: $184 to the Department of Education for round-trip Amtrak ticket between D.C. and Philadelphia.

DeVos’s family has a net worth of $5.5 billion, according to Forbes. Her husband Dick DeVos is the heir to the Amway multilevel marketing company.