Seriously, we've been in the digital age for 15-20 years now. This should not be hard. The instant any citizen dies, repatriates, or gets convicted of a felony the government should automatically revoke registration. If they would take this simple step, this wouldn't be such a tired and polarized issue. It would only require the coordination of a few offices and an automatic triggering mechanism.
Anyone that believes a politician when they say they can make the gov't work leaner and smarter is a fool. The bigger it gets, the more unmanageable and chaotic it becomes; until there is nobody that can be held responsible when catastrophes occur (hello FEMA).