Disobediance due to non payment

Due to dire financial constraints our company couldn’t make payments to some of the managerial positioned employee. The employee has a history of crankyness at work., abruptly leaving the workplace due to tiffs with other employees, refusal to come on time, rude behavior with superiors and juniors, refusing to tutor juniors. He was constantly excused by the senior management due his good work. His bad behavior and attitude was excused. Recently the firm was under heavy financial constraints and due to which a few managerial held positions were taken into confidence and promised salary in a month. Only this man started to create trouble by mentioning to his juniors that he isn’t paid to tutor them or he is only paid of some limited job etc. He was paid salary on time since the past 7 month and more months. It was only a matter of one month. Exactly the next month he was paid 5 days earlier but his previous months salary. He was promised his salary in the coming month yet he went to the higher management, mailing them abusive words and refusing to start his job. He clearly mailed that he shall not work till his dues for the previous month and the present month was not paid but he would come to work and complete his working hours to respect his workplace. He lied about having verbal conversations with the senior managers about the date of payments and mode of payments. What should be done because a complete 30 people shall suffer his decision to pause work till the dues are cleared. The senior managers decided to terminate him with the complete salary of the past but deducting one weeks salary for disobedience and false claims. Kindly advise