If you want to see a high-trust environment at scale, look at the development model of the Linux kernel. But this model is also inappropriate for many large org

If you want to see a high-trust environment at scale, look at the development model of the Linux kernel. But this model is also inappropriate for many large organizations, for various reasons - hierarchical structure of power, deadlines as requirements, information hiding. As a result, companies trade off programmer's throughput with these things.