This is definitely a **** up and reasonably big one but the hyperbole is a bit ridiculous. Big organisations and Government departments are likely to make big mistakes because of the size and complexity of the tasks they carry out. The business I work in employs a few thousand in the UK and about 250 at my location we make mistakes not because the management are hate filled morons but because they have large numbers of complex tasks. Now scale that up to the Home Office or the Department for Work and Pensions etc. And regrettable mistakes are going to happen. We smash organisations that don't follow the rules and then smash others that follow the rules too rigourously. No one seems to be suggesting that this has happened because their is genuine a desire to punish Commonwealth immigrants from 60+ years ago but rather that rules have been applied cack handedly and without sympathy. It is a apparently a national day of shame that some civil servants screwed up, where do escalate from there when we found something genuinely deplorable has happened?
i suppose you have to ask why over the course of 50 years some of them bothered to get paper work?
its gotta be a pretty small % that never bothered to get a pasport?