they already do pay rent money in cash.

the scum bags generally go from house to house on the private market screwing people over until no one will rent to them. Then the housing associations are forced to pick them up for a couple of years until they are thrown out of them into a homeless hostel (meaning a genuine homeless person stays on the street....). Then they get a free council house and eventually when they get enough rent arrears to the council, they end up with housing benefit going direct to council.

scum like them then take up valuable stock of council/housing association houses which should go to genuinely disadvantaged folk NOT scum who are poor because of their own stupid behaviour.