Hmm. If I train three people to do my job, how do I know you won't let me go (fire me) and get them to do it for considerably less pay ?

OK, so I should not threaten to walk away unless you give me a big raise, but democratising expertise is a balance which requires trust.

For those of you who understand pre-decimal UK money, there is a description of a half-guinea job - sixpence for doing it and ten shillings for knowing how.

How much should I be able to charge for having had that college education ?