Oregon's Eugenics Board tried that approach for 70 years.  After the Nazis extended the 'science' of Eugenics to its natural and logical conclusion (see Mengele experiments in another story on this page) Eugenics as the solution to social and criminal problems fell into disfavor.   You may want to revive it; I do not.  I don't trust the judgement of those who self-select to be in charge of those types of programs.