Plus, if the couple lack the mutual cooperation, self-discipline, and long-term planning to even want (let alone achieve) control over their fertility, then all that’s left is essentially a veterinary approach: coercive spaying/neutering or the equivalent.
This erases the central point, which is that we’re going for *human* well-being. If we see the very poor as both useless and feckless Untermenschen, Sanger and Hitler had the correct approach: segregate and sterilize. But I believe neither you nor I would go there. I think we’re both aiming at human dignity and well-being, not the Final Solution.
I'm aiming for the solution which decreases the probability of my own family and descendants having to deal with invading hordes of underclass, as per the "Camp of the Saints" scenario.
Mrs. Don-o, please believe I hold you in the highest respect. Nonetheless, you need to understand we're not talking "couples" here. This is a situation where a woman will give birth-Oh, forget it!-bear a litter of ten children with ten different sperm donors. This is a deliberate demographic invasion. Remove the incentive and the problem resolves itself.