Radioactive Oatmeal and Other Outrageous Government Experiments

It all seems like bad sci-fi or horror movies from the grindhouse era. Radiation experiments on orphan boys via oatmeal actually happened. That is only the tip of the iceberg! Thousands of experiments by the government, well respected universities, big pharma and big business have been conducted on unsuspecting people.Why has this happened? What's behind it? What are they doing now that we aren't being told?