When a group's first LP sells more than four million copies and is the No. 1 album of the year, it sets standards that are hard to live up to. Perhaps Colin Hay is singing about just that problem in Cargo's hit single, Overkill ("I can't get to sleep/ I think about the implications/ Of diving in too deep/ And possibly the complications"). For Men at Work, though, Cargo has few complications, and the implications are mostly thumbs up. The goods on Cargo are mostly fabricated from the same sort of tongue-in-cheek paranoia first evident on Business, though some of these songs move closer to raving lunacy. If an alarmist attitude pervades much of the LP, it also has sizzling moments with It's a Mistake, High Wire and No Restrictions, where Greg Ham's flute solo lifts the group's spirit. Too bad Ham didn't let loose more often on Cargo, since his laconic sax and flute arrangements contribute to the unsatisfying moodiness of the album. But that's a quibble; on the whole the LP is a fine achievement.