Frankly, I don't care.
Stealth tax? Well I am getting a card with my fingerprints in it, am i rite?
Good idea? If it helps stop fraud, terrorism, etc, sure... why not.
Own back? Well, the plan for ID cards have been in the works for years, but Manchester chosen? What better place to test an identity verification system than a place full of illegal immigrants.
Well an ID card has to have some real life use right, and not just for Government use. So it would make sense for shops, banks, etc...
You do realize however, that we are only one of the few countries in the world that doesn't have a proper ID card system in place yet.
I have a Hong Kong ID card and to be honest it is pretty damn useful. I can fast-track immigration officer at the airport when I enter the country. I put just my card in barrier gate thing, swipe my finger and it lets me straight in.