My ONLY two problems with a labour strike

Yes, the title looks quite counter-revolutionary and somewhat undemocratic to many labour union members but the purpose is not to dictate whether or not people should strike and who should. However, mine is to bring one or two very important elements of a labour strike which I believe have long been ignored by both striking employees and their union leaders. Or rather, I bring to your attention issues that have concerned me for a long period of time about labour strikes.