Yep, that is the dirtly little secret. But lets' face it, the 14th Amendment won't be repealed, sterilization will never happen, and the borders will remain wide open to the crimminals/terrorists of the world.
The almighty dollar and the almighty vote trumps national security, preserving the American middle class, and preserving what's left of American culture.
I believe the idea that ANY child born on US soil is an automatic US citizen stems from a relatively new reading of the 14th amendment. And I don't see how one gets to that conclusion from my reading of it - more likely it is something that self serving interests allowed to evolve.
I'd wager all congress would have to do is clarify rather than repeal it. But its moot anyway 'cause I doubt they'd even go that far.