The thing I find most amazing about this drama is that these people actually seem to believe that your passport, national insurance, bank account, drivers license, tax number, council tax number, etc etc, AREN’T already linked.
You already have a comprehensive digital footprint that is held by the government you goons. A single ID to simplify it is not a slippery slope to anything other than convenience and a way to actually get a help get a grip on who is in the country and when they shouldn’t be, which is apparently all anyone cares about these days.