Do note that you could be in the active group of an experiment if you had WW in the past 5-6 years. There was (is?) an experiment where they check some people less and even not force you to look but let you work it out on your own.

> Overall, it is a very pro-worker system

Having had to deal with parts of the Dutch system, I'm positive it's rigged against you. And you pay for it, it's literally a tax (WW premie, part of the "werknemersverzekeringen" aka employees insurance).