I'd hardly blame in general malnutrition, children's mental illnesses, poverty, and hunger in this country on the government. Granted, the government bungles their own efforts to remedy such evils and granted, the rich and powerful have dominance in any society over those of us who are neither, I don't think it is wise to attack governmental endeavors that are positive, even if it does not directly or immediately ameliorate current evils.
I have personally been involved with people from the welfare underclass and their lives are not pretty. However, government stupidity is only one factor and is not even a necessary cause. They, these poor people, have some incredibly, uh, strange notions of how their lives should be lived and make some stunningly poor decisions. And even when there are programs or opportunities that really will work if tried, they essentially refuse to take part.
Your sister's family apparently is different from this and seems also to be a haven, a bright, warm spot and I truly ask all God's blessings on them and their children. But why are those children in their care? I assume that their own parents have blown it somewhere down the line badly enough that authorities have determined that it is better their kids don't stay with them. I have seen some of these "parents". They have no clue how to be a human being; far be it from them to be able to show their kids how, then! Your sister and brother in law's kindness is wonderful, but separate thing from another kind of spiritual, universal human benefit that is the space program. I liken this more to (local) governments' providing essentially free public education- it may be rotten in some places, but works well in others and is basically a sound idea and generally of benefit to the people.
What was that about babies and bathwater?