I recall that the Edinburgh IWW branch recruited a SSP MSP (which may not have been wise) But it also had a few SSP MSP staff-members join.
This article on a possible strike by them brought the memory back to me
https://www.bbc.com/news/uk-scotland-scotland-politics-51474704
Ridiculously, the IWW had 4
Ridiculously, the IWW had 4 SSP MSP members;
https://libcom.org/forums/news/iwwand-nuj-dispute-with-tommy-sheridan-other-msp