I think having the same amount of money per character is unfair. I suggest boosting the amount by 1% per rank in Sleight of Hand (to represent "opportunistic earning"), except for those characters who are Lawful in alignment. Seriously, what self-respecting Rogue is going to earn only as much as their other-class colleagues? As Rogues are very item-dependent, this gives them a chance to compete. And a sneak attack specialist (with Penetrating Strike and weapon augment crystals for those normally immune) should make things interesting, plus give your party a chance to survive any traps.