"That works great and we'd do that as a matter of course, any time we had a reliable way of measuring how much work got done of how much intrinsic difficulty! When you're tidying a house, you can't measure area tidied to determine work done, it takes more effort to tidy a kitchen than a bedroom, and not in any standard way! If two people are going in without any prior reason to believe one of them is more efficient than the other, how hard they worked is an obvious if imperfect proxy for how difficult the job actually was..."
"I keep thinking that maybe the answer is that Golarion is a lower-trust society than dath ilan, and people are too scared the other person will lie about how hard the job was, or how good they are at it - which, I mean, you almost certainly have to be lower-trust, given everything, but - that doesn't answer why lovers and cofounders or even just very good friends would never make an arrangement like that?"