What baffles me about this is that migrants to the UK already have an ID card and penalties for illegal working are already absolutely eyewatering - there is a very stringent process for employers to follow to ensure that everyone they employ has the right to be in the UK.
Asylum seekers they have an "ARC" card - an ID card showing that they have claimed asylum with their name, nationality and DOB on. It will also say "work not permitted" or (if they've been waiting for a decision over a year, and have applied for permission) "work permitted - shortage occupations only"
Students or workers etc used to have a BRP - a biometric residence permit. As with the ARC card, a BRP is linked to fingerprints. However, this was migrated to eVisas which is essentially a digital ID card.
Was this a nice, easy swap, boding well for the prospects of expanding it to the entire population? Reader, it was not.
It was in fact such a disaster that there is a dedicated website for sorting out the problems. A report of the types of difficulty encountered is available here - the numbers are relatively small but when placed in the context of the small cohort this is being used for, still quite alarming - in six months there were nearly 500 reports. This Reddit chat is typical of the difficulties - now imagine that's your elderly mum trying to sort out an issue with her e-ID, without which she can't access her bank account, her pension, her bus pass, or even the library. Computer Weekly has noted concerns about the technical ability of the scheme and also serious issues with data protection.
I can't believe that any government would seriously now try to introduce this clusterfuck to the general population. Particularly since the impact it's had on actually preventing illegal working has been zero.