I heard this quote recently as an explanation for the low and still declining birth rates. Without God, nation or a grand idea, there is nothing to fight and die for and thus you focus on surviving and enjoying whatever earthly joys you can get. That takes away any drive to procreate and continue the bloodline into the future.
Things being expensive are not the reason why people don't have families and related policies make very little difference.
First thing we need is a monetary system that can sustain independently from how the population develops. A good jew free monetary system can support both population growth and decline without collapse and without the need for war. All of that is just there to transfer wealth from us to (((them))).