Eugenic mating happens in the West as well. How many Stanford graduates marry burger flippers?
That isn't necessarily Eugenics. If they think that "burger flippers" will produce inferior offspring, it's eugenics. But I suspect that if there is a low incidence of Stanford grads and "burger flippers" coupling it's due to other factors, for one thing the fact that they are two relatively small populations that likely have minimal interaction in a dating environment.
But, maybe things like this should be, you know, patched in an update to the system. It could always be better.