There is no reason why a joke should not be appreciated more than once. Imagine how little good music there would be if, for example, a conductor refused to play Beethoven's Fifth Symphony on the ground that his audience might have heard it before.
Well, fancy giving money to the Government! Might as well have put it down the drain. Fancy giving money to the Government! Nobody will see the stuff again. Well, they've not idea what money's for- Ten to one they'll start another war. I've heard a lot of silly things, but, Lor'! Fancy giving money to the Government!