It is absolutely a move toward his own gain, but isn't everything? Lou tends to think in those terms.

He returns with what the fridge can offer him - soda and water and half a sandwich.

"Try this first," He offers, cranking open the soda and offering it to Walt as he sits on the bed beside him. A dishtowel is in his hand too, from the linen closet. He was versed enough in the amenities of government housing, being just as subject to it as the other man.