Dispute over poor pay by contractors highlights plight of immigrant workers - The American fast food giant Taco Bell has been buying tomatoes produced by slave and sweatshop labour, according to a group of Florida tomato pickers who held a 10-day hunger strike outside the company's headquarters...They argue that the company, part of the Yum! empire - which also owns Kentucky Fried Chicken and Pizza Hut - has enough clout to insist that its suppliers pay a living wage.