Hi Aoc
About 4 years ago we all got 20% pay cuts and we were also told that any sick days that we took off would have to be either taken from our holidays or go unpaid. Now we all had to sign a letter to say that we would agree to this but there was not much choice given at the time. We were told that if we agreed to this that nobody would lose their job which was very quickly forgotten about.
One person was trying not to sign as she said that she couldn't afford the pay cuts but the pressure was immense and she gave in in the end.
Not sure if this answers your question but just what happened where I work.