You may have missed the key words. Teach as a conservative once in the classroom. Parrot back what the socialists want to hear prior to that point, so that you can reach the classroom and help children whose parents are liberal or even uninvolved to learn moral values.
Like the endless stream of “school reform”-ers, you’re seeing and addressing only symptoms. Your motivation is admirable, but you’re mistaken when you think the system can be salvaged by getting good people in the classrooms.
Don’t take this the wrong way, but that’s like saying, “Communism could be a good system if we could just get enough good people in charge.”
The compulsory school system was not designed to benefit children, but to make them into good little human resources - among other goals. It’s corrupt from the foundation. An infusion of good people would not fix it, but merely legitimize it.