Originally Posted by Escheton
People tend to make profit from their endeavors over time. The risky nature of adventuring also adds experience and as such levels over time.
Wbl is the chart used to calculate the profit-margin over time relative to increase in level a person of certain skill is expected to gain.
I give wealth based on the situation and what makes sense to me at the time. Besides I also rather give boons or items that have the potential to upgrade themselves when certain stuff happens rather than just finding replacement items all the time (not that you'll always keep the same items)