This is the same argument people use to defend attempting to ban secure end-to-end encrypted communication technologies--that clearly people don't really care so let's just take that away from them "because terrorism or whatever"--so color me unimpressed. The reality is that people everywhere deserve privacy, and all of your authoritarian reasons for taking that away from them are going to have a very high wall to climb to justify taking away that right.
> You have heard of a disposable / prepaid SIM card right?, you can get one down the road and you're ready to go with UPI again.
I am going to say this in no uncertain terms: zero-knowledge proof crypto payment protocols have a MUCH better user experience (and a MUCH higher success rate!) than requiring every single person--as, remember: I maintain that every person everywhere deserves privacy... this is a right that we should be ensuring for the people of our democratic state, and should be table stakes for innovations in payment technology--to maintain piles of burner phones (which isn't even all that easy to do, btw) while carefully managing the opsec inherent to having multiple pseudonymous identities.
> Call me authoritarian all you want, but we have things called laws, regulations, taxes that crypto is great at evading.
Great: as long as you continue to hold authoritarian viewpoints, I certainly intend to continue calling a spade a spade.