My point is that choosing to pay with a phone has no bearing on the decision to carry government issued identification.
If you live somewhere where you don't need to drive and can put a mass transit smartcard on your phone, I can see that playing into a decision to go without a wallet (especially if you can use NFC payment everywhere). But yeah, considering Chase Pay's low merchant acceptance when using a non-Samsung phone, I'm not sure most people can even come close to thinking that.