Until the government demands my income, chest hair density, penis size, vocal pitch, sexual history and all-time lowest spider solitaire score be put on an id card and added to a national database, I see no need to fret.
It's intrusive, sure, but then so is that unnatractive chunk of paycheck they take from me and call National Insurance. Intrusive, but tolerably so.
Honestly, this just seems to be an updating and consolidating scheme to modernize identification methods and put all the information we're all required to give at some point or other onto one handy little card. However, if it's to be forced through parliament then someone really should hurry up and let us know what the promised cap will be on the cost, because although I think the principle is sound, it's nowhere near sound enough to justify a cost per person running into hundreds of pounds.