It is also about something I constantly go on about at work. The more of us in the union - the better the deal we will get from our employers.
Even the IMF (International Monetary Fund) seem to accept that that if we have more trade unions then the rich will not be able to exploit everyone else as much and that workers will get more pay and a fairer share of the cake.
This is long term and not short term but if you want more pay at work, job protection and better terms and conditions then join a union. Check out the TUC https://www.worksmart.org.uk/tools/union-finder (but check first to see if you can join UNISON. The best union in the world http://www.unison.org.uk/for-members/joining-unison/who-can-join/)