Last first as is my wont.
I don't see anyone picking and choosing who gets to have babies. And yes, government should not be picking up the tab, especially for non-productive(generally will be low I.Q..not always)..that is dis-eugenics.
And lastly, I do not know who is advocating killing low I.Q. people...that would be forced eugenics.... another bad thing.
I'm not saying I agree with you, but I believe I misunderstood your intent. You think if the gov't is going to pay for babies it should only pay for babies of people who have high IQ scores. I initially took it that you thought the gov't should only allow people with high IQ scores to have babies.
So, would just one parent have to have the high IQ? And who decides what an allowable IQ is? I scored a 1440 on my SAT (1991 version) and a 146 on the Mensa IQ test back around the same time. I've never thought of myself as having above average intelligence, but my test scores say differently. Because of that, I don't think anyone with an IQ lower than mine should be allowed to decide. Fair?