Those who (claim to) expect them to improve on Gramsci maintain that this is where they turn bozo once and for all. I counter that they're well ahead of a lot of respectable competition--the babble surrounding Robert De Niro on "Red Angel Dragnet," for instance, may well be the first evidence ever that Taxi Driver has something real to say about urban oppression. Neither their funk nor their tone-poem dub has gained much pizzazz since Sandinista!, where both were easier to avoid. But I guarantee that they're not sinking into the pop slime--they're evolving, and here's hoping that someday they write songs as terse and clear as "Janie Jones" at this higher level of verbal, musical, and political density. B