A mature bandit gang... gang... no, a mature team, must have a complete and rigorous organizational structure.
In the Jianghu World's argot, it's called 'Four Beams and Eight Pillars.'
Exactly how these 'Four Beams and Eight Pillars' are divided is not set in stone, not because there's no desire for rigor, but because there simply aren't enough talents to uphold such a framework.
Youtiao served as Wang Yunxiao's team... in this small team's Quartermaster, specifically responsible for handling the accounts. He knew better than Wang Yunxiao himself about everything from the household finances to the brothers' family backgrounds, interests, hobbies, and even other various intelligence clues.
Besides the Quartermaster who handles the accounts, if you want to grow and become stronger, the team also needs a Counselor and a Cannon Head, one responsible for devising strategies, the other for leading the charge into battle.