people have different attitudes towards their work. some prefer to stick to one occupation as their lifelong career. these people are of the opinion that one can never do his work well unless he is devoted to only one job in his lifetime. so if one changes his job frequently, he will not get the necessary experience needed in his work.
others, on the other hand, like to change their jobs at times. in their opinion, people work in order to make more money. if they havea chance to get a better paid job, they will certainly try to get this chance. besides, if a person does only one job all his life, he will certainly be bored with it.

my idea is that interest is the most important if one wants to excel others in his job. so if a person is not interested in his job, job hopping is normal and even necessary. otherwise, he will suffer from his work, and inevitably, he is not likely to succeed in his career.