Effect of Real ID Act on illegal immigration.
An illegal immigrant today crosses the border with a certain (high) success rate, meets with contacts and finds a job that doesn't require documentation. Stays in the US for a while working at a farm, cleaning houses/offices/Wal-Mart, landscaping, child care, etc. Possibly purchases a car, motorcycle, or something like that (hover-craft, etc), and drives without a license or insurance. She gives birth to children who now get a birth certificate and are citizens of the US (her ID isn't required at the hospital).
At some point, she's stopped by a police officer and the officer says "Can I see your identification please?"
She responds, "I'm sorry officer, I forgot it. I must have left it on the armoire this morning and left without it", or "no have", or "eh?", or something to that effect. She's arrested, cited, deported, or let go.
Under the new system, the officer says "Can I see your federally-approved, state-distributed identification please?". Same results.
Now that's what I call spending billions wisely (billions that could otherwise be spent on, say, patrolling the border, infiltrating terrorist cells, distributing duct tape to the masses for the next time we're in "Orange" terror alert, sending monkeys to Mars, etc).