Culturally, most Americans have a problem with the indolent - those who choose to live off the money made by others. These people are economically un-productive. I suppose these folks could say that they were born lazy and that they cannot be asked to behave differently, but I think the bulk of people in a vibrant culture rightly reject this. As societies, we expect people to strive to economically support themselves and contribute to the support of those who authentically cannot do so. Naturally, we think poorly of those who can do this but choose not to do so.
We have not been replacing ourselves in most of the "Western" or "developed" world for a few decades now. North America continues to gain population through immigration, both legal and illegal. The tide of immigrants to Europe as refugees is the only way they keep their vaunted social programs viable, though you won't catch many politicians saying so. If it were up to native-born Westerners to keep our present culture at even a stable state into the future, it could not be done due to an inability or more likely a refusal to have and raise a necessary number of children to do so. It is a statistical reality for North America, Europe, and much of the far East that, without heavy infusions of "third world" breeding stock that eschew the so-called "value" of childlessness, presently strong nations will continue a steady population decline toward cultural irrelevance. To put it into a term, we are in the midst of cultural suicide.
Many Americans refuse to do what is required to avoid cultural suicide and such suicidal tendencies have become an accepted and even heralded addition to our culture. For example, people increasingly choose now fashionable "gay" and other deviant lifestyles that provide an easy rationalization against bearing and raising children in a culturally sustainable way. Although there are many lifestyle choices that encourage childlessness and cultural suicide, we are currently in the hypnotic embrace of deviant sexuality and its absolute desire for acceptance. However, this fact remains: if there are too many deviant people, there won't be enough kids.
It is bad enough that people choose lifestyles that preclude propagation, but now our leaders offer political "perks" to such groups and hand over our most vulnerable children to them for adoption and indoctrination into attitudes of sanctioned and vaunted dis-productivity. Every person, no matter what their personal excuse, who chooses to not birth and raise at least three children under sustainable circumstances is perpetrating cultural suicide. How can Western civilization hope to survive on its present course?
It is easy to blame others for the decline and so expect others to effect the needed turn-around. Better yet, we can look at ourselves and evaluate our own contribution to our cultural continuance. Are we marrying in ways that bring children into our culture? Are we teaching our own children the habits and expectations that will help our culture thrive? Are we being decisive in the direction that our culture should take toward sustainability? Does our personal conduct reflect such habits and expectations? Any change from our present course toward cultural suicide begins with each one of us. Like the indolent, we have little space for people who claim some exemption and could be birthing and properly raising the next generation.
In the end, we must either choose to abandon practices and attitudes that lead to cultural suicide or watch our nations and peoples fade into irrelevancy. The areas of western Europe and north America will continue on and be populated, but other, less suicidal cultures and peoples will occupy them.