Ever heard of this thing called A Court Of Law? Child support is a tort claim filed agaisnt the alleged father. The father gets his day in court, and if he loses, then he has to satisfy the tort just like Exxon does. Or the father can choose not to have any income. And if he has no income, there is no income to garnish and yet The Government cannot compel him to work to satisfy that tort.
Nope, no "involuntary servitude" there at all. You need to read up on this thing called The Court.
As for your "math". I recognize that you believe that a "unborn child" dies, but that has no bearing on the impact on the WOMAN'S likelihood of death. And a woman that carries a fetus to term, is TRHEE TIMES more likely to die than one who gets an abortion. That's just medical fact.
So if you want to inform a pregnant woman that an aborition kills an "unborn human being" - you also have to inform her that SHE is THREE TIMES MORE LIKELY TO DIE if she carries to term rather than gets an abortion.
Either its about "informed consent" ir its propoganda. And if it is propoganda, then it is illegal.