As someone who worked on the closest thing the UK government has to digital ID, it is indeed very very hard. The tech is hard, keeping it secure is very hard, the government data is terrible, commercial sources of identity are awful and doing it in a way that users understand and can use is almost impossible.
If it's complicated it's exploitable and if it's simple it doesn't work. We spent tens of millions and it basically went nowhere.
Well it went to Experian, Digidentity, Secure Identity and Barclays.
As well as various contractors, consultants and civil servants (of which I was one).
As someone who worked on the closest thing the UK government has to digital ID, it is indeed very very hard. The tech is hard, keeping it secure is very hard, the government data is terrible, commercial sources of identity are awful and doing it in a way that users understand and can use is almost impossible.
If it's complicated it's exploitable and if it's simple it doesn't work. We spent tens of millions and it basically went nowhere.