I dont think anybody, organiser or not, has suggested an artist should not be paid a fair fee. The question was how it should be arrived at. I certainly do not see how any performer can insist upon the admission fee being £??. Surely that is for the organiser to decide and, as has been said, if agreement cannot be reached dont book them.

My comments on hours worked were slightly sarcastic BUT it is not unique to folk singers. If I have a task in Scotland I am paid from when I arrive at site to when I leave the site. Travelling, preparation etc. is my problem and expense. If I dont want to do it they will get somebody else. Same with singers, plumbers, electricians etc.
Ever watch a wood-carver carve a full, detailed chess set? Many hours of work but can only be sold for a certain figure, after that no-one will buy ! £/hr is laffable ..........