Sadly, some people will never be financially stable. Should poor people be banned from procreation? What if you aren't financially stable until you are too old to have children? Not everyone can afford to freeze their embryos. What if you are financially stable, but then lose your job, or get sick, or your spouse dies or leaves? Should your children be taken away from you? Casting that kind of judgement, denying child bearing to those you deem unfit due to economic status (often tied to race, education, etc.) leans dangerously close to eugenics.