We don't have an ID system but we have a lot of ID requirements.
It's quite laid back compared to some countries though. They usually only come after your assets. Very few people go to jail.
Some years ago I moved abroad for a while and then they'd kind of drop your records after three years out of the country. Now I'm not so sure.
So while people don’t carry ID cards, everyone of working age definitely has this ID unless they exclusively work undeclared, off-the-books jobs. So I’m not convinced that the lack of ID cards is some meaningful privacy protection.
I'm skeptical of their effectiveness, and while I hesitate to make broad statements based on just a few days in a country it seems to me to be indicative of a major cultural difference.
So bottom 20% and top ~5% to 10% are golden, middle 20% to 60% are hoping (dreaming?) to make it up a few deciles, and 60% to 90% are hoping to make it to top 10%. And until they make it there, they have to dot their i’s and cross their t’s.
It's more recent that the pointless announcement has been made at many stations.