I don't think it's money, he had some big paydays after he got divorced and he should be fine financially. I think it's more that he's bored and Paulie didn't look too good last time out. Add on the fact that he's got a belt and is a powderpuff puncher and his fight with Hatton fell through then Mosley is a decent alternative for Paulie. And not bad for Mosley if he can come back at whatever age he is and win a belt.