They fly much shorter routes. I guess the number you really want to know is the number of staff per passenger kilometer, but the graphic doesn't say...

Other flaws:

* Misspells Aer Lingus.

* Claims low cost airlines have turnarounds of "up to 25 min" instead of "as little as 25 min."

* The 43% cost advantage is unclear (that's the cost advantage per passenger kilometer, or what?) and circles are not a good way to convey amount (is the radius important, or the diameter?).