Ah, so the national government or some other higher political instance can not tell the local executive what to do. Can not tell its police what to do. Am I getting this right? Do you even have a national police force? What then is it used for?
No, you're not getting it right. And no, we don't have a national police force, although there are some halfbaked plans to create one. There are national authorities, provincial and local. While all are governed by the same law, they have different responsibilities, i.e. national, provincial and local. I don't think that's very special, nor is it typically Dutch. (Frankly I don't see what good a 'national police force' would do. Most crime and most lawbreaking incidents aren't national, they are local, provincial at best. And even if there were such a thing as a 'national police force', they would still have be acquainted with local situations, therefore heavily relying on local expertise and personnel. Since local police are already in place, there is the clear danger of competition between such a 'national' police force and local police. In practice however, the creation of a national police force would require expenses present - and future - governments aren't willing to make. Not to mention the amounts of manpower that would have to be trained and paid.)
The previous two posts treat the same subject quite profusely, by the way.