Republicans feel they contribute so much to the general welfare through their job creation, their entrepreneurial activities and their work ethic that they have every right to skim a little off the top.

Interior Secretary Ryan Zinke and his aides have taken several flights on private or military aircraft, including a $12,000 charter plane to take him to events in his hometown in Montana and private flights between two Caribbean islands, according to documents and a department spokeswoman.

Zinke is at least the fourth senior member of the Trump administration to have used non-commercial planes at taxpayer expense, along with Environmental Protection Agency Administrator Scott Pruitt, Treasury Secretary Steven Mnuchin and Health and Human Services Secretary Tom Price. President Donald Trump has fumed at Price’s pricey travel, and Democrats say the revelations demonstrate a cavalier attitude by Cabinet members toward excessive spending.

The U.S. Treasury’s Office of Inspector General is reviewing the flight taken by Treasury Secretary Steven Mnuchin and his wife, Louise Linton, last week to Louisville and Fort Knox, Ky., following criticism of their use of a government plane on a trip that involved viewing the solar eclipse.

“We are reviewing the circumstances of the Secretary’s August 21 flight . . . to determine whether all applicable travel, ethics, and appropriation laws and policies were observed,” counsel Rich Delmar wrote in a statement to The Washington Post late Thursday.

“When our review is complete, we will advise the appropriate officials, in accordance with the Inspector General Act and established procedures,” Delmar added.

The trip faced a torrent of criticism last week after Linton posted a photo to Instagram showing her descending from the steps of a government jet while clad in high-fashion designer labels, which she individually named. When one woman questioned her, Linton fired back that the woman had less money than her and was “adorably out of touch.”

Treasury secretaries and other Cabinet members not involved with national security have traditionally flown on government planes only on rare occasions, including international trips, while taking commercial airlines for other domestic travels.

Cabinet officials can request government flights for specific criteria, although Department of Defense policy calls it “a premium mode of travel involving high costs and limited resources” and urges federal employees to make “every effort . . . to minimize travel cost.”

Sen. Ron Wyden (D-Ore.) last week requested a “detailed explanation” of the travel and justification for use of the government aircraft. One watchdog group, the Citizens for Responsibility and Ethics in Washington, also has requested records into the trip, saying it seemed “to have been planned around the solar eclipse.”

Nearly three days into a trip to Europe this past July, Veterans Affairs Secretary David Shulkin had attended a Wimbledon championship tennis match, toured Westminster Abbey and taken a cruise on the Thames.

The 10-day trip was not entirely a vacation. Shulkin was in Europe for meetings with Danish and British officials about veterans’ health issues, so taxpayers picked up part of the tab.

Yet he and his wife spent about half their time sightseeing, including shopping and touring historic sites, according to an itinerary obtained by The Washington Post and confirmed by a U.S. official familiar with their activities.