I'd rather they didn't do that.
I have paid for all my ilvl610 gear just by doing dungeons whenever a healer is on the 'Adventurer in Need'.
It is my main source of income, and I enjoy healing.
Even if you don't mean the 'reward' at the end of the dungeon, the 76+ gil per mob dead starts to add up. That is a good 3,000 gil a dungeon. Add on adventurer in need, and it brings it up to 15k for a completion, plus whatever the boss drops.