This has been discussd in depth and detail. The upshot was you believed the government website about NINO and used those figures to account for immigration. !
Just the same as
you believed the government website about immigration figures.. They both can't be correct. As I've already pointed out, the .gov NINO website shows figures for people from EU countries and people from non EU countries (as opposed to all NINO's issued to everyone including British people ) You can argue all you like Himmy. The figures do not lie.. However we all know that politicians do tell lies.. Make your own mind up Himmy (he won't)
Why would a government department decline a "freedom of information" request, such as the one the author made to them? Again, make your own mind up. (if your even capable of doing such a thing)
The difference is, I believed the government website about migration,
and the government website about NINO. They can both be correct. They don't measure the same thing. What I didn't do is confuse the one with the other. Migration website is about migration and NINO website is about NINO. You can't confuse the two. Although you just have.

The government website makes it abundantly clear that the two figures cannot be simply interchanged.
Perhaps Jonathon Portes can't be believed because he is distorting the facts, in exactly the same way as you're trying to do, so his credibility is suspect.
So, what your saying is, in
one year, one government department gets figures of 300,000,, and in the same year 648,000 immigrants apply for NINO's . Come on Himmy, tell me (and the rest of the UK, where the extra 348,000 came from.. As I pointed out previously, 348,000 immigrants could not have been working in this country to support themselves. (they'd have already needed the NINO) They can't have been claiming benefits. (again they'd need a NINO) So you tell me (and more importantly, the PM David Camoron) just where these 348,000 came from to appear on the figures produced by the National Insurance people. Just to be sure, we are talking about figures for
one year only, not cumulative figures over many years.