Every person a teacher

Every person in an organisation should be a teacher. Each people learns one (or a small number of) topic(s) well enough to become a teacher of it. They then teach this to other people in an organisation.

A person may have to go to an external course to learn a topic, but this cost to the organisation is repaid (to an extent) by this person passing on what they have learnt.

Obviously, the organisations need at least one person whose specialism is teaching, i.e. they can teach people to be teachers.

Whilst the organisations would typically be a business, this concept could be applied to whole societies, or the world...