Everyone seems to be missing the point. It is not about an individual making money. It is about the fact that once you hit 50 the ability to make NEW GIL dies. Making money off other players is not the issue here. The issue is eventually everyone except a few will be completely broke as they had no way of generating enough income to make up for their repair costs.

Somethings that could be added to offset this:

Free repair at end of successful dungeon/primal/leve. That way the 200-1000gil reward is not immediately wasted to get your gear repaired.
Higher gil rewards for dungeons/primals/leves.
Higher gil drops off npc type mobs.
Random chests in the world that drop Allagan pieces.

There are plenty of things to do to inject some ways to get more money than you are losing. This is not about a person becoming wealthy on the server (which happens at another's expense).