@SW-User most elderly people don't or many poor people as the two most recognised forms are driving licence or passport. My mother and mother in law both didn't have either for last 20 years of their lives. I didn't have a driving licence a few years ago due to a medical condition, it can be withdrawn at any time if a doctor decided I'm unfit to drive. Due to that condition i don't have a passport as I can't consider travelling either so I've let it lapse. I could easily be one of those with neither.
My issue is there is no requirement by law to have a government issued photo id but you can't vote without it. Simple solution: give everyone a free photo id then no issue. But to impose a requirement for it to vote but not supply it for free is to me discrimination against poor, elderly, disabled etc