Oxford students aren't employees, they request the services of Oxford. Ryanair pilots (although it may not look like it) ARE employees, and thus should be treated so.
Plus the "tiny few" of OAA's students who get into BA are placed on the Bus rather than 734... And the BA "rust bucket" 737's are in a much better state than MANY other airlines aircraft and yet they are much older. Some Ryanair 737's that are only 2 years old look far worse than the BA 737's!!!