Civil liberties are also important. It's one thing to require a mask, it's another to require people to carry a remotely readable ID badge. Does the system make it impossible to sniff a card's ID? I can't see how it could when every other card has to read it and store it, barring some very fancy encryption.
I would not be surprised to see kit that tracks these in the same way bluetooth and WLAN MAC addresses get tracked.
If so, I can picture the situation where a supermarket (or any store) might install trackers all over the store so they know where you are and how you travel. Although you could probably already do similar things with camera tracking.