scanning a id , also does not matter , a lot of corruption is still possible!
If you just look to exchange Bitcoin, then it indeed doesn't matter since you can buy and sell coins face to face. But this is in fact a problem for people looking to put their coins to work and spend them in physical stores. Just browse through the forum and see how many people are eagerly waiting for their local businesses to start accepting Bitcoin. No matter how inconvenient Bitcoin is as local payment option due to the fees and confirmation times, people are still willing to spend their coins occasionally in cafes and restaurants. It's just a nasty move from governments shitting in their pants.
Westren people are still very lazy https://www.youtube.com/watch?v=RRXecXfWARw hits the nail on the hat!