Financial domination is where a submissive will give gifts and money to a financial Domme. She in return may grant you the privilege of being named a money slave, finsub, paypig, human ATM, or cash piggy.
Money is power and control. Power and control belongs to Goddess Alexxxus, and so the money also belongs to Her. The money is not yours, and it never were. Dont you want to feel the thrill of giving Her everything?