According to https://www.ons.gov.uk/peoplepopulationandcommunity/populati... there's about 1.2% of the people in each age group <17 in England, which means 1.2*17 ~= 20 of the people in the England are ineligible for a drivers licence. So there's only about 6% of people in the England who could have a full drivers licence, but don't. So either they give licences out in the cornflakes at Tescos, or almost the whole adult population of the UK wants a drivers licence.
https://www.ethnicity-facts-figures.service.gov.uk/culture-a...
My country solves this by issuing a plastic ID card to each citizen. You apply for it at your local town hall, and it is free of charge. You can use that ID for voting, or any other interaction with the government when they need to confirm your identity. Hell, they even issued a smartphone application recently, that can be legally used as ID.
And more HN vagueness in this post: "My country" Why not just say your country name? After all, most of the world is developing. You don't have much to lose.