I'm childless and I don't see how this parade of horribles makes much sense. The simple facts of the matter is that a sufficient number of children growing up to be adults is required to sustain functioning society (and with it, things like retirement and healthcare systems). People who have children contribute to this fund directly. It is only fair if people who can't or won't do it contribute in some other way, e.g. by financially supporting the former category. It's not "double-whamming" at all unless you don't care about the society (but then you're welcome to go live in the wilds of Alaska or wherever), and it most certainly doesn't declare infertile people a "disposable class".