Ah, the unions.
Throughout history, unions have done a massive amount of good for a huge number of people. We have all benefited from increased safety legislation that arguably starts with unionisation, or is at least accelerated by it, for instance.
However, in my current job, I just offered a short term role to a guy for £200/day, he was happy to take it. One of the union bods (and it is a small industry sector, maybe 80 people on the union's 'ok' list) called him up and warned him off our job as they were demanding £350+/day from other clients. I know some of those other clients are actively recruiting guys from South Africa an Romania on under £200/day just because of the bullying and overreach of the union. So, as a result, I can't use the guy I wanted, I have to pay more for someone I don't want, who is going to get all pissy for working a full-length day despite earning more than any other person (including myself by a huge margin). Honest days work for an honest days pay doesn't come into it, it's a feifdom protecting jobs for the top half of that union list who think that £1200/week is not a fair deal for an NVQ2/NVQ3 (GCSE/A-level rough equivalents) guy and hold the industry to ransom.
It pains me to say it, but Thatcher had a point.