This clearly shows that these airline staffs are not motivated at their work place. In psychology, motivation is refers to the initiation, direction, intensity and persistence of behavior. It is a temporal and dynamic state that should not be confused with personality or emotion. Motivation is having the encouragement to do something. A motivated person can be reaching for a long-term goal. (Deci and Ryan, 1985)
According to Abraham Maslow's hierarchy of human needs theory, the most widely discussed theories of motivation, human beings have wants and desires which influence their behavior and only unsatisfied needs can influence behavior, satisfied needs can not. For this case, the pilot and the flight attendants are avoiding to receive the scheduling office's call to fly on holiday since they are dissatisfied with their job and do not want to be given any duty. Maslow says that people are motivated by hierarchy of needs, which includes money and for this case the airline staff are also raising concern that they are not remunerated properly.
In the case of the pilots and the flight attendants, the job needs to be redesign which requires specifying the tasks that make up a job for an individual or group.