What we need instead is an orb like thing that scans your eyeballs.

If only there was tamper-proof, cryptographically secure chip in everyone's pockets, coupled with a handheld device that can wirelessly "read" that chip.

If it's in your pocket, then you might leave it in your other pants. Better to just have that chip embedded in your palm. You can even fashion it with LEDs that change color with your age. When you reach 30, you can then be told your Last Day has arrived and they are ready for Carrousel. I'm sure we can fold in plenty of other sci-fi tropes all at the same time too

Listen if Jenny Agutter is involved, count me in!