There was a "Yes, Minister!" episode on this principle:

The new minister was having a driver, driving him to wherever, so he could use the time as office-time, in the back..

They shamed him into quitting that, & he became significantly less-effective, which was what the attack had intended.

IF the people are being productive in the air, then I'd put them in a set of gov't-owned aircraft, secret-clearance all the way through, so they could do real work, while on the job.

However, I'd also force them to use normal-airlines when going 'round for their vacations, so they get actual commercial-airline experience, so they know what they're representees are experiencing.

Sometimes the right answer is to convert travel-time into work-time, & if you can't do that on a public flight, then yes, private-aircraft are the means, but it ought be gov't owned, not personally-owned or chartered.

It must serve the country, not the privileged, see?

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