Indentity cards... maybe not. Why use ID cards when you can short range scan the genetics of your target, and link it in with an empire-spanning computer system (aka MEGAMI), which EASILY has the capacity to store personals on every single citizen?
Ketsuriui Standards are an interesting currency. The military sometimes uses them, sometimes not. The civilians sometimes use them, sometimes not. Personally I like the idea of a digitalised currency, but instead of common thieves, we'll start seeing "harvesters" - people going around forcibly dechipping others for their funds. And i'm not even going to go into the CERTAINTY of vast loss through hacking. It's a good idea, but it wouldn't work for a number of reasons (and now I come to think of it, what's to stop people messing with their chips to add credits to them remotely?).
In order to offset the failings of digital currency, I propose we use BOTH in a phasing-out period for the Standard, so that if any problems do arise the procedure can be rethought before being carried out, or cancelled outright...