No. But if they're forced to share, if it's no longer possible to buy your way to a better afterlife... I think people might find a reason to change. Or at least be less awful.

[Because despite Sabriel's restrained demeanor, she is absolutely reckless- and willing to take drastic steps, to remedy what she feels is an unfair situation.]

Besides- we need to recover the orb, which means we're going to have to persuade Entr'i to give it up, one way or another. Stealing it isn't an option, so helping her achieve her goals is the obvious choice.