It was also my perception that the Dutch had a live-and-let-live toleration, that seems like the opposite of the monitoring regime described in the comment. (I'm not really referring to marijuana, I'm speaking more generally.) To this naive outsider, who admittedly has something of a crush on Amsterdam, that level of monitoring is puzzling.
But maybe all those bike roads and dikes point to another aspect of the culture -- a little too well-supervised and well-engineered.