Why are the plug songs so good while the Jukebox Jury songs are so terrible?

[action52 554]

I mean seriously, even the best Jukebox Jury songs range from "decent" to "fucking terrible." Meanwhile the plug themes are brilliant almost every week. Why is this?

[Julia 477]

A conspiracy that goes all the way up to the highest ranking members of the Illuminati.

[Johnny Unusual 525]

I think it's partially because there is some scaffolding to the Plugs songs but there isn't so much to the Jukebox Jury. Also, a lot of people who make "comedy songs" seem to take the same "comedy shortcuts" that aren't "comedy" and are painfully not "short".