"Again, we need to be very careful in attributing a majority of Bothy songs to the farmworkers themselves. "
First I've heard of it Vic and my favourite book o the subject id David Kerr Cameron's 'The Ballad and the Plough
From your link:
"In the first half of the 20th century, the bothy ballad took on a more comical 'stage' form through the works of George Bruce Thomson, G.S. Morris and Willie Kemp. These more recent compositions - by and large very humorous - are sometimes called cornkisters to distinguish them from older 'traditional' bothy songs which tend to be more sober accounts of work and conditions on particular farms"

The oral tradition at the beginning of the 20th century in Scotland was beginning to deteriorate and become mor reliant on print, as was the English one
The songs we are discussing here were those made in the latter half of the 19th century and recovered from a dying tradition
Jim Carroll