The access to teacher training is highly competitive; there are ten applicants for every training place to become a primary schoolteacher. It does not seem to dawn upon those in Britain and the United States who want to implement the Finnish system that it would mean firing something like three-quarters of the current teachers.

That is from new and interesting Education Unchained: What It Takes to Restore Schools and Learning, by Erik Lidström, mostly from a Hayekian perspective. The author claims, by the way, that the Finnish model has been declining since it has been made more student-centered and less teacher-centered.