“So how exactly can one reside in say, Iowa, and attend a Cali High School??? Of course one cannot.”
If you live in Tijuana and your kids are bi-national (born in a San Diego hospital free of charge) your kids can attend school in San Diego. Every day thousands of kids come across the border in the morning with their bookbags etc. In the afternoon the same kids go home to Mexico. This has been going on for decades and the local school administrators do not care.
“This has been going on for decades and the local school administrators do not care.”
But I do if any of my federal taxes go to the public school system in San Diego. That means I am subsidizing this.