The idea is, which annoys most of the super liberals, is to tie this information in together, via a common number, your ID number. That doesn't go down well with the crowd who love "The Prisoner" with all that "I am a man, not a number!" cobblers. Nevermind, we already have at least 1 and anything upto 10 numbers already associated with us. Maybe I can use that whole "I am not a number" argument to get me out of NI contributions