Who gets to choose is the crux.
The answer is that each individual gets to choose. It's their own body, their own life, and children are their own responsibility.
The government getting involved with things like this always goes wrong. Always.
Further, while IQ/raw intelligence does have a definite genetic component, things like laziness vs diligence, foolishness vs wisdom, etc, are not genetic. They're hereditary to some degree in that we learn a lot from our parents, but there is no gene that makes a person 'lazy' or 'not lazy.'
Further still, any time you start passing responsibility for something on to the government, you're explicitly shifting responsibility away from actual people, and thus encouraging irresponsibility, which works directly against any attempt to push society at large towards being more responsible, healthy, and productive.
The best solution is to try to champion virtues culturally, rather than enforce them politically. There's an entire thesis worth of discussion on the philosophical and psychological reasons for this, but I don't want to derail the thread completely on that.