Our Favorite 'Kitchen-Table Populist' Is Coming To Town. By Tim Vanderpool JIM HIGHTOWER IS Thomas Paine in a Stetson, Michael Moore with a drawl, a bona- fide populist for modern times who lacerates corporate greed and political corruption with down-home humor. This week the tall Texan brings his bulls-eye perspective to Tucson for a special dinner benefiting the Pima County Democratic Party and Southern Arizona Central Labor Council. He'll also attend a reception sponsored by the National Writer's Union. He's also the host of a syndicated show, Hightower Radio (broadcast until recently on Tucson station KMRR). Hightower also writes a syndicated column appearing in the