In the european social survey the design weights are scaled to the sample size (see quote and source):
As with the design weights also the post-stratification weights are scaled to the sample size, i.e. the initial weights provided by the post-stratification procedure are divided by their arithmetic mean. (page 4 of pdf , see link below)
I dont really see the benefit of scaling the weights compared to keeping them as is, if they are unscaled after post-stratification. What is the benefit of this procedure?