I'm guessing you probably don't work in Health Care. Or if you do, you don't work at the level of policy or population health.
The issue with implementing Eugenics in certain populations... is that suspicion of Health Care workers is abnormally high in those populations. I'm not talking about the mentally ill, or the deficient. But certain ethnic populations harbor DEEP suspicions of medical professionals and the medical industry in general. So, over time, it's become hard to get those populations to do even those things that really are objectively "good" for their health. Let alone implement a Eugenics effort.
The problem is social... not technological. We have had cheap, and effective technology to keep people from getting pregnant for decades. How do you get people to use it??? If you had ever worked in health care, you would realize this is not so simple a question to answer. You have to get people to trust you. That's what Buffet should have spent his money on. Getting certain populations to trust medical professionals.
All Liletta is... is yet another birth control device. We have those already. How do you get people to use them??? I mean forget Liletta. How do you get people to use ANY of them ???? The patch? Implants? The pill? ANYTHING?
If Eugenics was the goal, the money was wasted. Because what you need for Eugenics... is cooperation. And, right now, you just don't have that from certain populations.
Now... if you could FORCE them to use birth control... then you'd be on to something. But that's already been tried... with Norplant. And it turns out that forcing them doesn't really work either.