Making money and then leaving is a perfectly natural thing.
Xiaofan did this to confuse the enemy, giving them the impression that he came to XG just to make money, and once he earned enough, he'd leave with the money.
Moreover, requesting a compensation of ten million without batting an eye shows how eager they are to leave.
Originally, the procedure to withdraw wasn't complicated. Just sign the papers, transfer the money to the opposite account, and once they confirm receipt, the two could regain their freedom.
However, Xiaofan had already foreseen that when Liang Yanlong approached Wang Erma, he didn't get a straightforward answer, instead, was told to come back and wait for two more days.
That is to say, Wang Erma must have reported Xiaofan's plan to leave upwards. Now, Xiaofan could only sit back, cross his legs, and leisurely wait for news from the other side.