Turks believe it's a sin to throw away bread.
Not a light-hearted Petshop Boys sin, but a serious sin worthy of celestial punishment. For this reason, you'll often see plastic bags of stale bread hanging next to rubbish bins.
Perhaps they're hoping someone will make use of it (though I'm not sure what your guests will say when you tell them you made the bread pudding out of stale bread found in a carrier next to the skip). Or perhaps they're deferring the punishment to someone else (after all, someone's eventually going to have to bin it). Thus it's probable that all Turkish dustmen are going to hell.