they should still have that choice as they cannot choose what happens with their union dues. far too many unions spend inordinate amounts of money on political activities instead of their own membership. then top it off with all the bureaucratic bloat and high paid leadership I think people must be given the right to abstain.
If you want to dodge the free ride then have the dues go to a non political spending charity of your choice provided it is local, may I suggest children's healthcare hospitals