They will be happy to keep everybody money till then . Interest and riba money going into their profit . Their is hadees on it .let me quote it for you .
"From Jabir: The Prophet, may peace be on him, cursed the receiver and the payer of riba, the one who records it and the two witnesses to the transaction and said: "They are all alike [in guilt]." (Muslim, Kitab al-Musaqat, Bab la'ni akili al-riba wa mu'kilihi; also in Tirmidhi and Musnad Ahmad)."