The issues of traditional satisfaction survey
One of the issues that comes along with these surveys is non-response (Müller, Völkle & Hattrup, 2011). Some employees do not believe that the company is serious about changes, others are simply not motivated to fill in a several page long survey. Moreover, these surveys only capture employees feelings at a specific point in time. Yet, as employees feelings toward their job are not stable, the results 3 months later might be different already. Even though, companies gain valuable insight into their employees' attitudes towards the company, they cannot expand on the full potential of the survey. A snapshot of job satisfaction is taken and used to steer the staff into better reactions towards their work.
Source: https://teambay.com/why-job-satisfaction-is-important-for-companies/