He owns his own business, so I guess technically both his dime and his employers, not that it really matters. The statement of "those flying on their bosses’ dime often have little choice of carrier for last-minute flights" is definitely not true - most employers allow for some flexibility to pick carriers based on schedule/stops/etc, and last minute prices tend to converge anyway.

Also, the broader assumption that "rich people don't pay attention to the small stuff like this" is a faulty one too. Nearly all of really wealthy people I know didn't get there by failing to pay attention to details that make them money.