1. Cuz the money has already been spent giving freebies to illegals.
2. Cuz it won’t generate enough revenue to sustain itself.
3. Cuz you don’t spend money on luxuries when you can’t afford to put food on the table!
If they took just the money spent on illegals alone (schools, healthcare, foodstamps, welfare, an prisons) they would have enough money to build the railroad.