Amsterdam is trying to set a precedent. By developing this register, they're showing national/international policy makers that transparency can be done. Aside from the fact that any level of gov should be open about how technology affects their citizens.

This kind of question gives me strong flashbacks of corporate meetings (:

Transparency. It’s Amsterdam because the city of Amsterdam decided to publish their algorithms in use. They do the same for all kinds of data and systems already, see data.amsterdam.nl