Except the government also has stuff it needs to keep secret, so they have a vested interest in unbreakable padlocks existing. So they want a skeleton key for a

Except the government also has stuff it needs to keep secret, so they have a vested interest in unbreakable padlocks existing. So they want a skeleton key for all civilian padlocks, but they will continue to use magic padlocks. That requires journals on padlock research, which probably won't themselves be kept behind magic padlocks. Clever locksmiths will always be able to make powerful padlocks using that research.