Maybe if his lazy ass got up and contributed to the household the floor would be warmHe certainly had no issues jumping up and down and proving he was well enough to go to the chocolate factory.
Grandpa Joe was pure scumbag, including to the very end.
Willy Wonka: I can't go on forever, and I don't really want to try. So who can I trust to run the factory when I leave and take care of the Oompa Loompas for me? Not a grown up. A grown up would want to do everything his own way, not mine. So that's why I decided a long time ago that I had to find a child. A very honest, loving child, to whom I could tell all my most precious candy making secrets.
Charlie: So that's why you sent out the golden tickets!
Willy Wonka: That's right. So the factory is yours, Charlie. You can move in immediately.
Grandpa Joe: And me?