Wierd Al's phrases are intended to be "non-sensical" and appeal to a wide variety of listeners therefore he can be more free with the phrases and just be down right "goofy".
Mud's parodies, on the other hand, have a direct & specific audiance. One with a political mind set and most generally of above average intelligence. They must stick to the issues to accomplish the goals.
One of the first rules of writing (which I believe absolutely applies to music/lyrics as well) is know who your audiance is before you write it. ;o)
Weird Al is awesome, but he's going for Top 40/broad appeal....Mud's going for appeal to the conservatives...he could careless about Top 40. :o) Same with the rest of us in here that "FReep" songs...they must stay true to the rythym of the original song, make sense and expose the issues.
Weird Al covers a wide variety of topics. His lyrics are for the most part cleverly insightful and that's what makes them so humorous.
Writing sentences that just rhyme about obvious observations isn't clever or amusing to me, it's tedious.
Sorry, I'll shut up now and go away now.
Couldn't agree more...very well-stated...MUD