Re: unless ... made so difficult that carrying an ID card makes things ... easier.
What's more a fictitious need for them will appear on every government form. I was recently called up for jury service, and the form contained a list of all the acceptable ID you were supposed to bring, photo id mostly. I plain didn't have it - I have a paper driving license etc etc. so I contacted the court:
"I don't have this ID"
and back came the answer
"doesn't matter, anything will do"