Norman Spack, Boston-based endocrinologist famous for “salivating” at the prospect of medicalising children for life, took the Dutch model, ran away with it, monetised it (by default, because the US health system works that way) and it spread across the USA like wildfire.
Susie Green went to Norman Spack, brought that run away diffusion model back to England and bingo! You have the Tavistock scandal.