Earlier quoted context omitted.
> IDs were being asked for by police and others as a matter of course rather than of suspicion. Is the existence of an ID really the problem there? I like the idea that having to provide an ID is optional and the police can't force someone to comply without a good reason, but the existence of an UID for people seems really necessary in a lot of cases, to prove someone did not vote 10 times in an election, to track yo…
Interestingly, voter ID laws are massively controversial in the US. The rationale is because they have disproportionate effects on African-Americans, and that voter fraud (eg somebody voting ten times in an election) does not seem to actually happen that frequently anyway.
of course, there are many other reasons why a mandatory national ID would be politically unfeasible in the US.