Britain to introduce compulsory digital ID for workers

I am quite confused by this point:

> A new digital ID scheme will help combat illegal working

If you are an immigrant you already have to prove your right to work with a share code:

https://www.gov.uk/prove-right-to-work/get-a-share-code-onli...

And if you claim to be a citizen you must show a passport or birth certificate:

https://www.gov.uk/prove-right-to-work

So how exactly will this new digital ID help "stop those with no right to be here from being able to find work"?

Showing a birth certificate isn’t a particularly hard bar to pass if you want to fake that you’re a national to be fair. You need just that and a printed letter and there’s nothing an employer will do beyond copying that (afaik you can’t look up a birth certificate and check it’s valid)

But it would need to align with the records associated with their NI number no?