To help clarify a few things...
We have put our foot down on this topic on two previous occassions. We explained to him that the events are mandatory, end of story.
I know its his wife because we use to work under the same company (although I was in management and she was in an hourly position, a plant of over 2500 people). The trick is, so did my supervisor. Although none of us knew each other while working there.
He was terminated from his former position (a lucrative position) because his wife was using his corporate card for personal spending. He had been warned twice before termination. Indirectly, we worked for the same boss. When he applied for my open supervisory position, he explained that was a mistake. So I called my old boss for his opinion and he was very supportive. Knowing this position did not require him to manage a corporate card, I hired him.
So, if that's not a convaluted mess...

Either way, we are in a tough position. The events were are asking him to attend, only occur twice per year. Other than those two days, he is an excellent supervisor and strong leader. We have been very hesitant to terminate him because of this issue. However, we were hoping for some kind of legal consequence to his actions..hence the question regarding the pay cut.
I greatly appreciate your feedback and time. Sorry if it was tmi
