A social security number/card is not exclusive to citizens. Green card/permanent residents, for example, usually get them - particularly, if planning to/already working.

Any kind of national/citizen id would need a whole new process and require it be provided to 100% of existing citizens. Time-consuming and certainly a cost associated with the process.

It’s one of those “in theory” easy things, but a lot more difficult in practice, I imagine.

Difficult to tell if this was a joke or autocorrect. Being forced to play a game (sudoku) as a loss, sounds… odd.

Seppuku is the Japanese word for a type of honorable suicide by cutting your own stomach in a Z shape (or at least attempting to).