At the moment the opposite of eugenics is taking place: intelligent, good job? Probably you'll have 1-3 kids on average, and start having children late due to other concerns. No job, on long term benefits? Knock as many out as possible - after all then there's a bigger house as you can't be in cramped accommodation. Might as well start knocking them out early as well, ashw at else is there to do? Social pressures against this? Nope - we've scrapped those!

The most severe genetic defects people used to die from, and hence helped filter the "swimming pool". Now we have the ability to ensure that they lead as normal lives as possible - ensuring that the crud in the pool is recirculated.