That's exactly where this started: legislating what rights parents and children have. The problem is that legislation is not the gateway to rights and the more legislation there is, the more our rights get trampled on by people who think they know what's best to do in all circumstances and try to force everyone else into that mold.
In the case of CPS, people started by saying it was the government's job essentially to mediate families and protect abused children. The government should never have had to step in there. Churches, families and communities should've taken care of this problem. But because people turned blind eyes or wouldn't get involved when they should, eventually outrage forced a government solution; and whenever there's a government solution, it always seems like abuses of that power quickly follow. Power attracts abuse of power. And so now children have becomes pawns in this game.