I think your husband has to make his own decision as to his worth. If he's confident about his skills and ability, why doesn't he look around and see if there is another employer out there willing to offer him a better job and a higher salary? He may (or may not) find that his age puts him in a less favourable position than a possible younger competitor for any specific role, but if he's got lots of experience, this should give him an advantage over a younger candidate. I don't think threatening to leave will solve the problem. He could tell his boss he was disappointed at the increase and ask why he didn't get a higher increase, but perhaps the company is experiencing a difficult time at the moment.? But if he enjoys his job, don't push or nag him. It must be his decision.