I think that is is beneficial for workers to change jobs often.
To begin with, changing jobs is one of the best ways for workers to change their working condition. For example, workers feel stressed when they don’t get much salary. I think it is not good for their health to suffer from stress. They should change jobs which get high salary. Second, it is good for workers to change their jobs to improve motivation. They can meet lots of new peers by changing jobs often. Meeting a lot of people and getting stimulated are a great way to stay motivated. If workers keep working in the same situation for a long time, it leads the decrease of motivation.
Therefore, it is beneficial for workers to change jobs often so that they can seek for high salary and increase their own motivation.