It’s not that easy . There are privacy rules that come into play . The government doesn’t juts have one magic computer that knows everything . Do you want the clerk at the RMV looking at your taxes ?
Plus who monitors who’s qualified to have a gun licese , ability to vote, and ability to drive ? Different agencies . One might be state , one might be local .
Logistics aren’t as easy as you think .
It's not as complex as you make it out to be.
No, the clerk at the RMV doesn't need to see my taxes. They just need to see that the system indicates a denial of my Voting or Firearms endorsement because I haven't paid whatever I owe to the IRS.
As for the State vs. Federal issue.... As I said, I believe this should be a Federal ID, issued at the State level. That allows the State to determine who is allowed to drive and the Federal Government to determine who IS NOT allowed to vote or have a firearm (as those are Federal Rights).