I don't know what you mean by eugenics axe, but I was not talking about any kind of intervention, rather the opposite, let just not panic over ageing and just try to find a way for the economy to adapt to it.
you can say what you want, but humanity has multiplied and the planet resources are limited. So the current plan of keep multiplying doesn't seem reasonable. For as much effort anyone does to not pollute, having kids is by far the biggest pollution source.
Also is not like being many humans is lowering the power gap, rich people just have more people to abuse.
To finish my point, I'm European, and unlike America, here the mid/high class are not ultra Catholic having tenths of kids, so my perspective could be a bit different than yours. There is not a clear correlation between wealth and kids, if anything inverse.