I'm late to the table, most things have been covered but I want to stick my oar in
The first letter I wrote to my MP on
"Entitlement Cards" and was categorically assured that "they will never be compulsory"
Later they were re-branded as "ID Cards" became compulsory and we were going to pay for them. Unfortunately my MP became Conservative, so my next letter was simply agreed with whatever points I made against them
The more valuable an identity document is, the greater the motive to create forgeries, along with Government data being sent in the post and getting lost in ways that you simply couldn't make up - I have no confidence in this being done sensibly.
I'd rather have the funds to hire the 10,000 more policemen or however many it is that the country could afford with the vast sum of money the national ID card and database will cost.