I've been pondering this same question ever since reading a hint of how CPS was created from @richq11 's post earlier this week.
Often the way to understanding how to UNDO something is to trace how it was put in place. I wonder if perhaps delving into the history of CPS might offer a hint as to how to at least remove some of their massively overreaching power. The legal and legislative history of the formation, funding and empowerment of CPS might offer some hints as to how lop the head off this hydra.
Yes! We often start at the top and work our way down when really we need to start from the bottom!
Right, the same way we're finally tackling the abortion problem: working backwards to undo one step at a time like untangling a ball of yarn.