Central registered of all citizens with ID-number. I'm pretty sure your nation has it, as does mine. So the government knows where you live, and where you can vote. If you move these things are automatically updated. So it's easy to make sure everyone can vote in the "correct" ballots ect.
None of this is true with the US
No no no, that's simply wrong.
US healthcare system is the best in the world, at doing what it's designed to do. Issue here is that they're measuring it on care provide vs cost, while the US system is optimized for profits.
If they instead ranked the results by which system generated the most private profits the US would be first.