If one is truly objective then they were covered in my "permis" statement. As you say, money isn't the only concern but one of many. And one can even stay a long time if the current place of employment continues to be the best overall deal.
But "loyal"? This is not rational. You should never be more loyal to some party than that party is to you. If you are then you've been indoctrinated. You've been had. It's fine to work somewhere a long time because you feel it's currently the best place to meet your overall objectives. It's not ok to work somewhere because "you owe them" or "they've been good to me in the past".
Being somewhere 14 years is certainly an "employee smell" if you will. Usually when someone stays that long it's because they have a misplaced sense of "family", believe their market value to be low (they could be correct), etc., etc. Not because they think it's the best overall deal out there.