Like many people who had to endure a state education in the 1980s, I lost many hours in the classroom thanks to teachers striking at the drop of a hat. Lessons were disrupted for hours on end. End of term reports were left unwritten. Parents lost out on income because they had to unexpectedly look after their children when they should have been at school. 

Now it's the turn of university lecturers in 64 universities - a mainly left wing bunch of academics who are divorced from reality. Some of them will be mathematicians, although their mathematical skills don't appear to extend to working out that if more is being withdrawn from a pension scheme than is being paid in, eventually there will be a day of reckoning.