Earlier quoted context omitted.
It is the same situation, entity A didn't pay entity B the money they agreed to pay.
Even looking past the time aspect which you slipped in (rent late, wages unpaid are definitionally different: unpaid is not, by necessity, late, and late is not necessarily "never going to arrive") wages are the payment of labor performed and rent is the payment of use of private property. Rent-seeking is derided behavior (by economists!) for this exact reason: A landlord does not (in the vast, vast, vast majority of…
Those two are the same, a person who is late would typically never pay if they didn't get threatening mail to "remind" them.