Grievance is demanding the other party to an agreement honour it? No. Grievance is bitching and crying when you're asked to honour an agreement.Excellent. At last a sensible interpretation.
About 35 years ago a close friend who is partner in a big law firm told me they were on the lookout for a lawyer to specialise in Treaty claims. They already had commercial lawyers, litigators, family lawyers, patent specialists etc. He said they may have to lure an intermediate lawyer with the offer of a partnership and I asked why this area of law was so important to them. Simple, because he could see the grievance industry taking off. He said it had huge growth potential for generating fees and the Govt usually paid the claimants costs.