When this happens en mass, we have a fluid labor market where workers are easily able to flow from one job to the next, but what can stop that flow?

当这种情况大规模发生时， 我们有一个流动的劳动力市场， 工人可以很容易地从一个工作流到下一个工作，但什么可以阻止这种流动呢？