Glueman, as usual, is confusing "folk music" with "the definition of folk music". Music is a group of sounds. Definitions are groups of words. Jazz, folk, and any other music is made by people with instruments(or possibly computers, these days). Committees are generally not involved.
Definitions of jazz, folk etc, however, can certainly be made by committees. Or individual people. You can make up a new definition of folk any day you like.
The word "orange" is not an orange. This needs to be remembered occasionally.And a rose by any other name will smell as sweet.