The state needs to give public schools a larger 'piece of the pie'. [=the state needs to give public schools more funds]
He's the best player on the team and he wants a bigger 'slice of the pie'. [=he wants more money]
His plan to reduce the national debt seems like 'pie in the sky'.
(..) - And it's all free! - HonestJohn-- Boy, that's the place. l can hardly wait! Right here, boys! Right here! Get your cake, pie, dill pickles and ice cream. Eat all you can. Be a glutton. Stuffyourselves. lt's all free, boys. lt's all free. Hurry, hurry, hurry, hurry! (..)1940 Pinocchio