Increasing one's power is the driving force of this game. It is why people
grinding cash, exp, and gear(eq). Therefore, it should also be the easiest
way to remove money from the game. Since not all of us are cursed with the
burden of debating what to do with our coffers full of mithril, here are a few
ideas:

1) Have a machine that sells reinc pendants for 15m. (These are already sold
by Zin often enough for 6-9m.)
2) Nosummon Area that requires money to enter, entry once per boot. (This
would remove money, keep eq rarity high, keep exp tune high.)
3) Unique high sac value item, maybe with some stats, maybe multi slot to make
it unusable. (for people making demons, blades, or ect.)
4) Ungettable navigator for ships.
5) Remove restriction from equipment/weapon. (gkeeper gloves, kraftigar,
stormfall, atrocities, empyrean, ect)

Items with greater power should have a time limit placed on them. Here are a
couple ideas:

1) No background reinc, but with twist. (wiz picks one of the guilds.
ter, ect to help limit the power of the reinc.)
2) Ungettable weapon/equipment for X amout of time. (ex: +25 dex arms for 1
year or aether type weapon for 6month)
3) +10 exprate/spr item that works from inventory for X amount of time or
reinc.
4) Add plus size/stats to character till boot for X amount.
5) Ability to add one spell/skill to one reinc.