G.R. Patterson III wrote:
snip
but I suspect it was simply that they didn't want to
encourage business use of private aircraft for fear of liability
issues.

Give that man a cigar. That's the number one reason corporations
look down on the use of private aircraft for business travel. The
folks in the risk management department just tremble at the thought of
the liabilities that could be incurred if an employee crashed while on
the clock.

I'd love myself on company business, but I realize that flying my
plane poses a much greater risk to the company than going commercial.
For the company, it's just not worth the few dollars I'd save them
(unless I was insured for some ridiculously high amount).
John Galban=====N4BQ (PA28-180)