I wouldn't want it to be just for members, though question 1 or 2 should be "Are you a Dues paying member?" The union affects the craft, and if a little survey changes someone's mind into paying dues because the union actually addressed one of the surveyed areas it was worth the 0.004 kWh spent compiling the electronic survey questions, submitting to a requester the 189kb, recieving a filled survey at 213kb, and porting the results into Access for compilation and the 3 seconds to filter and sort dues/non-dues and topics.
Belittling and aggressively tr ying to remove non-dues from all processes ensures you have no benefits to give to anyone who views the union with skepticism since you'reso tight-fisted no one can see your offer. Plenty of things are best open to the wider craft and show solidarity, brotherhood, and a sense of belonging to invite these people in. Payscale, the protest signs if that's your shtick, MMS, and RRECS; these last two affect the current *insert descriptor* messing up the route and the next (dues paying) PTF stuck going to it after the reg bids off.