What an obnoxious post, Ronaldo.
You seem to not know the difference between state and private schools. Private schools can kick kids out easily - essentially, their parents are paying customers, and schools have that as their trump card - "thank you very much, take your custom elsewhere"
What do you suppose happens to the kids who are excluded permanently? I find it distasteful that, as a teacher, you can claim to "not care" about those kids. They're not sent to a campsite on the Isle of Wight to wait until they are 18.
What teachers need is a set of consistently applied, robust rules in their school. I teach in a school which has gone from good to satisfactory to SM and back up again over the last 8 years. When we went into SM, we had no consistently applied discipline policy. The HT had his head in the sand, and the OFSTED ruling was pretty much inevitable. Our current HT is good. She insists on standards, and insists that we all follow the same rules. Some of my colleagues are lazy, or feel they don't "need" to follow policy, and they tend to be the ones with problems.
Teachers also need to support each other.
Your "good job I shipped out of state schools" is repulsive. Well done, you.