Little bit ironic BTW, seeing as The Netherlands has one of the highest phone wiretapping rates in the world.
Phone wiretapping is simply one way a country can decide on by which criminal activities should be traced. Other countries do so in different ways, and comparing them, especially in different jurisdictions is not straightforward.
For civilians that do not exercise criminal activities, wiretapping will be less of an influence on their lives as ACTA or non-net-neutrality would be. On average.
The latter is particularly worrying, because we already know that in other areas, police access to private data collection is seriously being abused, and very badly organized.
The oversight basically starts and ends with granting the permission to wiretap. Everything else is murky as hell.