From the film "Call Girl". A police chief has a job for a police inspector whom he considers to be very good. He says: "Det är inget man kan ge till vem som helst. Ett enmansjob." After a while he adds: "Allt har varit i säck innan det varit i påse." I know what the phrase means but I am not sure I know what it means in this context. The only explanation that comes to my mind is that the first sentence is a sort of fraze which is often said in a similar situation. But I am not sure.