It's simple, I get even richer than I already am whilst you slum it.

Budgeting your ass ensuring that you are living on the bare minimum whilst I enjoy everything fine and luxury in life.

You are so stupid for me, you will pay me over and over again. You will go deep into debt and borrow finances from anything and anyone. Your misery and misfortune is my happiness. To see me continuing to live a life of luxury gives you some meaning. So pay up, that is your only use and you know it.