If I didn't buy the Trot line against state intervention in the labor movement, I would advocate a ban on such mixed organizations having the power to bargain collectively. And while I don't think raids are a good use of any union's limited resources, I would certainly never trust a cross-class "professional association" to represent my class interests, or those of any worker, at the bargaining table.
More on this thoroughly confusing arrangement from a highly ironic source:
http://www.uniondemocracy.com/UDR/161-Four_state_nurses_associations_quit_AFL-CIO_union.htm
-- "Hige sceal þe heardra, heorte þe cenre, mod sceal þe mare, þe ure mægen lytlað."