We have DNA testing now, we need to make it the legal proof needed to establish paternity.
That, and also to allow the appeal of old cases where there's a claim of no paternity (like this one), with an AUTOMATIC revocation of the child support order and restitution to the "former" father. Anything else is a horribly monstrous injustice.
Me, I'd give away my assets to family or friends, wait about 90 days and then refuse to work and go on welfare. Let's see them collect from that.