Considering reasons 1. and 2. of the PR for not mandating -- both should be handled through education and training. Any proposed legislation could stipulate that carrying an MLU or a PLB does not entitle the rescuee to immediate rescue. It allows the rescuee to be rescued when it is safe to do so (it is not an entitlement). (Carrying a beacon and hiking into a winter storm on Mt Hood entitles the person carrying the beacon to have their body recovered if they activate it and thus give their family closure.)

As for reason 3, that seems to be a personal problem for the individual who risks his/her life to avoid a small fine -- literally a Life or Death Decision over a couple of bucks, life is all about choices and free will.

My opinion.