Social stratification is the essence of a democratic society. However, there can be drawbacks, such as the inequality of the classes. There comes a time when you have to wonder if those that are in better socio economic classes exploit those who do not have an edge in societal classes. So, to answer your question, it is both good for society in that it allows for classes to progress, and it may be bad since those in lower classes will have a harder time advancing.
