Teachers I know spend their entire summer marking and preparing for the next term or year. My daughter, who is head of English, is lucky to get two weeks holiday per year. She has school trips, debating championships, school promos, parents meetings and goodness knows what else. She regularly works a 12 hour day and her pupils from ten years ago still keep in touch and consider her to have given them the best start to adulthood possible.
Perhaps American teachers are a little molly-coddled. But it has to be said that American teachers I have met here just do not cut the mustard. They often refuse to accept local conditions, are not team players and always have what they think is a 'better way'! Needless to say they do not last long.
A teacher must love his/her profession. When a private student of mine passed for both Cheltenham and Benenden I was over the moon.
Back to unions though, there are obviously good unions and bad unions, but unions are their membership - a bit like churches. Loony churches have loony members. My experiences of unions in the UK, where sometimes membership is a condition of employment, has been good. I cannot think of an occasion when a union promoted or even tolerated laziness. Go slows - yes, in response to unfair management. If a union member is no good at his job he is at risk of the sack whether he is a union member or not. If he is not sacked then blame weak management.