(1) Representation
(2) Honesty
(3) Scale
but it's a hell of a lot better than hearing from only those companies whose Chairman plays golf with the PM's Chief of Staff, or picking them out of a phone book.
Business organisations allow such firms to pool their resources and magnify their voices.
Surveys provide cover to speak candidly. Direct talks do not.
Weatherspoons and Mr Tice's UK real estate empire may not feel Brexit exposed, but a Welsh lamb producer sure as hell does.