Yes, but how much salary would he expect for the privilege of taking up what could be used as a passenger seat?
Enough to feed me and the cats
Like any "apprenticeship", those apprenticed don't expect to receive much salary, if training and experience are being provided. In many professions, this is how qualified people plan to replace themselves in retirement by investing their time and wisdom in younger trainees who can work their way up through a system.
Cheers
Whirls