I'm sure that there are bad examples out there, but most foster parents aren't doing this for the $200 a month they get from the state and most social workers and sadistic bastards that enjoy taking kids from their parents.
There needs to be some safety net to protect kids from abusive parents and this is what's evolved. If it's not working how about proposing a better system. I'm not being sarcastic, if you have ideas how about sharing them and maybe we can fix some of the problems instead of pointing fingers and complaining.